Timeline
(2760)1916
The year in brief
On the night of 8–9 January 1916 the last British troops sailed from Cape Helles and the Gallipoli campaign ended in Allied defeat. On 16 February the Russians took Erzurum, and on 29 April, after a siege of 147 days, the British garrison of Kut surrendered to the Turks. On 21 February the Germans attacked at Verdun, and the battle turned into a struggle of attrition that lasted until 18 December. On 24 April the Easter Rising broke out in Dublin, and on 31 May the Battle of Jutland, the largest naval battle of the war, began. On 4 June the Brusilov offensive began, shattering a large part of the Austro-Hungarian army, and on 5 June the Arab Revolt began near Medina. On 1 July the British and French attacked on the Somme, and the British Army lost 57,000 men that day. On 27 August Romania entered the war on the side of the Entente, and on 29 August Hindenburg became Chief of the General Staff, with Ludendorff as his deputy. The Battle of the Somme, in which tanks went into action for the first time on 15 September, ended on 18 November without a breakthrough. On 21 November Emperor Franz Joseph I died, and on 6 December the Germans entered Bucharest unopposed. On 12 December Germany and her allies proposed peace negotiations to the Entente, which rejected the offer on 30 December.
For Poland it was a year in which Poles fought on both sides of the front: the Legions on the Austro-Hungarian side and the Polish Rifle Brigade in the Russian army. In July brigades of the Legions held up the Russian attack at Kostiuchnówka for three days, losing about 2,000 killed and wounded. After the fighting in Volhynia Józef Piłsudski demanded his discharge in protest at the treatment of the Legions, and in September the Legions were renamed the Polish Auxiliary Corps. On 5 November a manifesto of the German and Austrian emperors was proclaimed in Warsaw and Lublin, promising a Kingdom of Poland, called self-governing but without a king, a government or borders. As early as 9 November the occupiers called on the Poles to volunteer, which caused indignation, and few volunteers came forward. On 6 December the occupiers proclaimed an ordinance on the Provisional Council of State, whose members were only to advise. Russia protested against the act, and on 25 December Tsar Nicholas II listed among Russia's war aims the creation of a free Poland from all three partitions.
January
- 01
- Allies take YaoundéOn 1 January 1916 Col. Gorges's British column entered Yaoundé unopposed. The Germans had left the day before and were falling back south, towards Muni.
- King Peter arrives in SalonikaOn 1 January 1916 the ailing King Peter I of Serbia reached Salonika. After the retreat through Albania and a stay in Brindisi he chose the Entente base.
- 06
- Sinking of the battleship King Edward VIIOn 6 January 1916 the British battleship King Edward VII struck a mine laid by the raider Möwe off Cape Wrath and sank a few hours later.
- Start of the Battle of Sheikh SaadOn 6 January 1916 Younghusband's vanguard attacked the Turkish trenches at Sheikh Saad on both banks of the Tigris. It stalled and the Turks were reinforced.
- 08
- Key eventEnd of the evacuation of GallipoliOn the night of 8–9 January 1916 the last British troops sailed from Helles. After eight months of fighting the Gallipoli campaign ended in Allied defeat.
- End of the Battle of Sheikh SaadOn 8 January 1916 Aylmer's exhausted troops did not renew their attack at Sheikh Saad. The Turks withdrew in the night; the British had lost about 4,000 men.
- 10
- Entente notifies Greece of the transfer of the Serbs to CorfuOn 10 January 1916 the Entente ministers in Athens told Greece that the remnants of the Serbian army would be shipped from Albania to the Greek island of Corfu.
- Key eventAustrians capture LovćenOn 10 January 1916 Austro-Hungarian infantry reached the summit of Lovćen, the Montenegrin mountain fortress above Kotor. The road to Cetinje lay open.
- Murray takes command in EgyptOn 10 January 1916 Gen. Archibald Murray took over the Mediterranean Expeditionary Force from Monro to guard the Suez Canal and rebuild the Gallipoli divisions.
- 11
- French occupy CorfuOn 11 January 1916 a French detachment landed on the Greek island of Corfu to prepare a refuge for the remnants of the Serbian army evacuated from Albania.
- Start of the Erzurum offensiveIn January 1916, in the depths of winter, Yudenich struck the Turks in the Caucasus. The first attacks on Mount Karadağ were to draw their reserves away.
- 13
- Austrians occupy CetinjeOn 13 January 1916 Austro-Hungarian troops entered Cetinje, Montenegro's capital, unopposed. The king and court had left; the government again sued for peace.
- Ottoman troops in KermanshahIn January 1916 Ottoman battalions arrived in Kermanshah. The city was not captured, but was a centre of Persian nationalists allied with Germany.
- Greece refuses consent to the occupation of CorfuOn 13 January 1916 the Skouloudis government protested at the French occupation of Corfu, citing its perpetual neutrality. The Entente did not yield.
- Russians take KangavarOn 13 January 1916 Baratov's corps took Kangavar in western Persia after hard fighting, routing Kanitz's detachments and the Turkish battalion supporting them.
- 14
- Fighting on the WadiOn 14 January 1916 the British found the Turkish trenches on the Wadi empty. The Turks slipped away to the Hanna defile; the Tigris Corps lost over 1,600 men.
- Percy Lake appointed commander in MesopotamiaOn 14 January 1916 Gen. Percy Lake, chief of staff of the army in India, was appointed commander in Mesopotamia in place of the gravely ill Gen. John Nixon.
- 15
- Möwe captures the AppamOn 15 January 1916 the raider Möwe captured the British liner Appam off Madeira. A German prize crew took her with prisoners to the United States.
- Publication of the Papen papersIn mid-January 1916 the papers taken from Papen by the British at Falmouth were made public. The stubs of his cheques pointed to the agents he had paid.
- First Serbian soldiers on CorfuIn mid-January 1916 the first Serbian soldiers from Albania began to arrive on Corfu. Many were so exhausted that they died soon after coming ashore.
- Serbian government moves to BrindisiIn mid-January 1916 Pašić's government left threatened Scutari and sailed to Brindisi in Italy. A few days later it moved on from there to Corfu.
- King Peter leaves SalonikaOn 15 January 1916 King Peter I of Serbia sailed from Salonika on a French warship. He went to take a cure at the spa of Edipsos on the Greek island of Euboea.
- 17
- Russians capture KöprüköyOn 17 January 1916 the Russians entered Köprüköy on the Aras, lost to the Turks in 1914. A breakthrough in the mountains forced the Third Army to retreat.
- King Peter at EdipsosIn mid-January 1916 King Peter I of Serbia reached the spa of Edipsos on Euboea. Ailing after the retreat through Albania, he stayed there for over four months.
- 22
- Austrians take AntivariOn 22 January 1916 Austro-Hungarian troops took Antivari (Bar), Montenegro's only important port. The whole Montenegrin coast was now in enemy hands.
- Reports of Romanian–Russian talksA British chronology records the start of Romanian–Russian talks on military aid on 22 January 1916. Other sources do not confirm that date.
- 23
- Austrians occupy ScutariOn the evening of 23 January 1916 Austro-Hungarian troops entered Scutari unopposed, ending half a year of Montenegrin rule in northern Albania's chief town.
- Austrians take PodgoricaAround 23 January 1916 the Austrians entered Podgorica, Montenegro's largest town. In the turmoil of those days the Albanian leader Isa Boletini was killed.
- 27
- Shipping Control CommitteeOn 27 January 1916 Asquith set up the Shipping Control Committee under Lord Curzon. It was to share out scarce tonnage between home, the forces and the Allies.
- Key eventBritain introduces conscriptionOn 27 January 1916 the Military Service Act received royal assent. Unmarried men in Great Britain aged 18 to 41 became liable for conscription.
- 31
- Smith-Dorrien resigns the East African commandUnder 31 January 1916 the chronology of the war records Gen. Smith-Dorrien's resignation of the East African command. Serious illness had kept him at Cape Town.
- Airship raid on the MidlandsOn the night of 31 January–1 February 1916 nine naval airships sent against Liverpool bombed the Midlands instead. 70 people were killed and 113 injured.
February
- 01
- *Appam* puts in at NorfolkOn 1 February 1916 the British liner Appam, captured by the raider Möwe, anchored under the German flag in Hampton Roads. A row over US neutrality began.
- Boris Stürmer becomes prime minister of RussiaIn early February 1916 the Tsar removed the 76-year-old premier Goremykin. His successor was Boris Stürmer, a conservative close to the Tsarina.
- 02
- Bulgarians take ElbasanAt the turn of January and February 1916 the Bulgarians entered Elbasan in central Albania, forestalling the Austrians, their rivals for influence there.
- Loss of Zeppelin L 19On 2 February 1916 the airship L 19, back from a raid on the Midlands, sank in the North Sea. The trawler King Stephen refused to help; 16 airmen died.
- 08
- Britain asks Japan for naval helpOn 8 February 1916 the Admiralty framed a request for Japanese warships. Tokyo refused to send destroyers to Europe but stepped up patrols in the Indian Ocean.
- Sinking of the cruiser Amiral CharnerOn 8 February 1916 Otto Hersing's U-21 torpedoed the French cruiser Amiral Charner off Lebanon. She sank in minutes; only one sailor survived.
- 09
- Serbian government on CorfuAt the beginning of February 1916 the whole leadership of Serbia in exile gathered on Corfu. On 6 February the regent Alexander arrived there from Albania.
- Sinking of the gunboat Hedwig von WissmannOn 9 February 1916 the British boats Fifi and Mimi caught the German gunboat Hedwig von Wissmann on Lake Tanganyika and sank her after a chase of several hours.
- 10
- Military Service Act comes into forceOn 10 February 1916 the British Military Service Act came into force. Single men had three weeks to come forward or to apply for exemption from conscription.
- Serbian army assembled on CorfuIn February 1916 most of the surviving Serbian army assembled on Corfu. The French fed and clothed the soldiers, and the staff formed them into new divisions.
- German memorandum on armed merchant shipsOn 10 February 1916 Berlin told the neutrals in a memorandum that from the end of February armed enemy merchant ships would be treated as warships.
- 11
- Sinking of the cruiser ArethusaOn 11 February 1916 the cruiser Arethusa, Commodore Tyrwhitt's flagship, struck a mine off Harwich. She could not be towed in and was wrecked on a shoal.
- Italian detachment on CorfuIn February 1916 Italian Carabinieri landed on Corfu. Greece, suspecting Rome of designs on the island, protested and a diplomatic dispute broke out.
- 15
- Agreement with the BakhtiariOn 15 February 1916 the British reached an agreement with the Bakhtiari khans on cooperation in protecting the Anglo-Persian Oil Company's oilfields in Persia.
- Extension of British shipping licencesOn 15 February 1916 a British order brought almost every ocean voyage by a ship from the British Isles under licence, to make better use of scarce tonnage.
- 16
- Key eventRussians capture ErzurumOn 16 February 1916 Cossacks rode into Erzurum, left by the Turks. The fall of a fortress thought impregnable was Russia's greatest success in the Caucasus.
- Montenegrin soldiers on CorfuIn mid-February 1916 Montenegrin soldiers who had not laid down their arms reached Corfu. They were a handful, as King Nicholas's army had already dispersed.
- War Office takes over air defenceOn 16 February 1916 the air defence of London passed from the Admiralty to Field Marshal John French, and soon after that of the whole country.
- War Office takes over the Mesopotamian campaignIn mid-February 1916 control of operations in Mesopotamia passed from the Government of India and the India Office to the War Office in London.
- 17
- Arrest of the consuls on ChiosIn mid-February 1916 Allied sailors arrested the German and Austro-Hungarian consuls on the Greek island of Chios. Greece protested.
- Pro-Austrian Albanians occupy BeratIn mid-February 1916 Essad Pasha's men gave up Berat. The town was taken by Albanian units allied with the Austrians, and soon the Bulgarians appeared there.
- Germans cross into Spanish GuineaOn 17 February 1916 Kamerun's governor told Berlin he had taken refuge in Spanish Muni with his whole force. The last units had crossed two days earlier.
- 18
- Russians occupy MuşIn mid-February 1916 Russian Cossacks rode into Muş unopposed. They found the valley, whose Armenian inhabitants had been massacred in 1915, depopulated.
- Key eventSurrender of MoraOn 18 February 1916, after a siege of a year and a half, the German garrison of the mountain above Mora surrendered. It was the end of the fighting in Kamerun.
- 21
- Key eventStart of the Battle of VerdunOn 21 February 1916 more than 1,200 German guns opened fire on the French positions at Verdun. A battle began that lasted until December 1916.
- Airship LZ 77 shot downOn the evening of 21 February 1916 a French anti-aircraft gun shot down the airship LZ 77 near Revigny, flying behind Verdun. None of the crew survived.
- Dispute in Congress over armed merchant shipsIn late February 1916 Berlin maintained that armed Entente merchantmen were auxiliary cruisers. In the US Congress a revolt against Wilson's line grew.
- Dismissal of Henry SclaterOn 21 February 1916 Gen. Henry Sclater ceased to be Adjutant-General of the British Army. His place at the War Office was taken by Nevil Macready.
- Macready leaves the BEF staffOn 21 February 1916 General Nevil Macready ceased to be Adjutant-General of the BEF. He had handled its manpower since the first days of the war in France.
- 22
- Fowke becomes adjutant-general of the BEFOn 22 February 1916 Gen. George Fowke, until then Engineer-in-Chief, became adjutant-general of the BEF, in charge of personnel in Haig's army to the war's end.
- Macready appointed Adjutant-GeneralOn 22 February 1916 General Nevil Macready became Adjutant-General of the British Army. At the War Office his main task was to find men for the front.
- 23
- Portugal seizes German shipsOn 23 February 1916, at Britain's request, the Portuguese seized 36 German and Austrian ships that had lain in the Tagus off Lisbon since the start of the war.
- Robert Cecil becomes Minister of BlockadeOn 23 February 1916 Asquith announced that Lord Robert Cecil, with Cabinet rank, would direct the whole blockade of Germany. So the Ministry of Blockade arose.
- 26
- Charge at AgagiaOn 26 February 1916 the Dorset Yeomanry caught the Senussi retreating from Agagia, broke them with a charge and captured their commander, Ja'far al-Askari.
- Russians take KermanshahAt the end of February 1916 Baratov's corps entered abandoned Kermanshah. Persian nationalists, Germans and Turks fell back towards the Iraqi border.
- 28
- British squadron formed to bomb German industryIn February 1916 the British naval air service formed a squadron of Sopwith aircraft to raid factories in Germany. It became the nucleus of No. 3 Wing RNAS.
- Reports of Essad Pasha's government in NaplesA British chronology records the move of Essad Pasha's government to Naples on 28 February 1916. Sources show that Rome was only proposing the city to him.
- 29
- Action between Alcantara and GreifOn 29 February 1916 the armed merchant cruiser Alcantara fought the German raider Greif off Shetland. Both ships sank and more than 200 sailors died.
- Lifting of the blockade of KamerunOn 29 February 1916, after the end of the fighting in Kamerun, the Allies lifted the blockade of its coast, declared in April 1915.
- Germany will not postpone submarine warfareAt the end of February 1916 Berlin told Washington it would not defer its orders against armed ships. Intensified submarine warfare took effect from 1 March.
March
- 01
- Extended submarine warfare beginsFrom 1 March 1916 German submarines could attack armed Entente merchant ships without warning. Passenger ships were to be spared.
- Start of the war with the Sultan of DarfurAt the beginning of March 1916 the Governor of Sudan, Reginald Wingate, decided to strike at the Sultan of Darfur, Ali Dinar, who had sided with Turkey in 1915.
- 04
- Möwe returns from her first cruiseOn 4 March 1916 Germany announced the raider Möwe's return from a cruise of over two months. She sank or took 15 ships; her mines sank a British battleship.
- Russian landing at AtinaAt dawn on 4 March 1916 Russian plastuns landed at Atina, behind a Turkish position on the Black Sea. The Turks fled and the road to Rize lay open.
- 05
- Key eventStart of the Kilimanjaro offensiveOn 5 March 1916 General Stewart's 1st Division set off south from Longido. It was to go round Kilimanjaro from the west and cut off the German retreat.
- Resignation of FarmanfarmaAt the turn of February and March 1916 the government of Prince Farmanfarma, Britain's closest friend in Tehran, fell. It had lasted just over two months.
- Resignation of the Persian foreign ministerAlong with Farmanfarma's government in March 1916, Persia's foreign minister Moshaver ol-Mamalek left office, not Mohtasham os-Saltaneh as the chronology says.
- 06
- Newton Baker becomes US Secretary of WarOn 6 March 1916 Wilson announced that the new US Secretary of War would be Newton Baker, former mayor of Cleveland, seen as a pacifist. He replaced L. Garrison.
- Sepahsalar becomes prime minister of PersiaIn early March 1916 Mohammad Vali Khan Tonekaboni, the Sepahsalar, hero of the 1909 revolution and advocate of accord with Russia, became Persian premier.
- Sarem od-Dowleh becomes foreign minister of PersiaIn early March 1916 Prince Akbar Mirza, Sarem od-Dowleh, a grandson of Naser al-Din Shah educated in England, became head of Persian diplomacy.
- 11
- Fighting at Latema Nek beginsOn 11 March 1916 Gen. Tighe's troops attacked the Germans on the Latema and Reata hills by Taveta head-on. Day assaults failed; a night bayonet attack followed.
- Start of the Fifth Battle of the IsonzoOn 11 March 1916 the Italian artillery opened fire along the whole Isonzo front. Cadorna began a limited offensive to relieve Verdun at France's request.
- 12
- End of the fighting at Latema NekAt dawn on 12 March 1916 the British saw their own men on the Latema ridge. The Germans had left the pass during the night and fallen back towards Kahe.
- Reports of the capture of KerendAccording to British sources, on 12 March 1916 the Russians took Kerend on the Kermanshah–Baghdad road. They did not hold it: in April the Turks defended it.
- Third Chantilly ConferenceOn 12 March 1916 at Chantilly Allied commanders resolved that a joint offensive would start soon to relieve Verdun, and that the Salonika army would stay.
- 14
- British retake SollumOn 14 March 1916 General Peyton's troops entered Sollum unopposed, and the Duke of Westminster's armoured cars routed the fleeing Senussi forces.
- Dismissal of Alfred von TirpitzIn mid-March 1916 Grand Admiral Alfred von Tirpitz, creator of the German navy, left office after losing the dispute over submarine warfare.
- 15
- Austria-Hungary breaks off relations with PortugalOn 15 March 1916, six days after the German declaration of war, Austria-Hungary broke off diplomatic relations with Portugal. Its minister left Lisbon.
- Key eventAustria-Hungary at war with PortugalOn 15 March 1916 Austria-Hungary followed Germany and broke with Portugal. The two were now at war, though by contemporary sources with no separate declaration.
- Eduard von Capelle becomes naval secretaryOn 15 March 1916 Berlin announced that Tirpitz's successor at the Imperial Naval Office would be Admiral Eduard von Capelle, his long-time collaborator.
- António José de Almeida becomes prime minister of PortugalOn 15 March 1916 the Evolutionist António José de Almeida took charge of the wartime "Sacred Union" government. Afonso Costa became its finance minister.
- 16
- Sudanese troops enter DarfurOn 16 March 1916 Kelly's mounted units left En Nahud for the Darfur border. By the end of March they held the wells of Umm Shanga and Jebel el Hilla.
- Roques replaces GallieniOn 16 March 1916 the gravely ill Gallieni resigned as Minister of War. His successor was General Pierre Roques, 1st Army commander and an old friend of Joffre.
- Russians take MamahatunOn 16 March 1916 a Russian outflanking detachment entered Mamahatun on the Erzurum–Erzincan road, taking 800 prisoners and five guns, per Allen and Muratoff.
- 21
- Fighting at KaheOn 21 March 1916 van Deventer's horsemen took Kahe hill and station, while Sheppard's infantry stalled at the Soko Nassai. At night Lettow-Vorbeck withdrew.
- Germans withdraw from KilimanjaroOn the night of 21–22 March 1916 Lettow-Vorbeck left his Ruvu positions and fell back along the Usambara Railway. Kilimanjaro passed to the British.
- 29
- Shuvayev replaces PolivanovAt the end of March 1916 Tsar Nicholas II dismissed the Minister of War, Aleksei Polivanov. He was succeeded by the army's chief quartermaster, Dmitry Shuvayev.
- General Oka resignsAt the end of March 1916 Japan's war minister Oka Ichinosuke left office through illness. During his tenure Japan entered the war and took Tsingtao.
- 30
- Sinking of the hospital ship PortugalOn 30 March 1916 the German U-33 torpedoed the Russian hospital ship Portugal in the Black Sea off Rize. Between 85 and 115 people died, including nurses.
- Ōshima becomes Japanese minister of warOn 30 March 1916 Vice-Minister General Ken'ichi Ōshima became Japan's minister of war. He held the post until 1918, including in Masatake Terauchi's cabinet.
April
- 01
- End of the "Fokker Scourge"In spring 1916 new Allied fighters and flying in formation robbed the Fokkers of their superiority over the Western Front. The date of 1 April is notional.
- Third attempt to relieve Kut beginsOn 1 April 1916 the fresh 13th Division began taking over trenches at Hanna. Gorringe ordered the attack, but rain put off the third relief to 5 April.
- 06
- Start of the advance on TrebizondOn 6 April 1916 a flotilla with two plastun brigades sailed from Novorossiysk to Lazistan, covered by the Black Sea Fleet. Russia was moving on Trebizond.
- First attack on SannaiyatAt dawn on 6 April 1916, after a night march, the 7th Division attacked the Turkish position at Sannaiyat. Fire halted it hundreds of metres short.
- 17
- Fighting for Kondoa Irangi beginsIn mid-April 1916 van Deventer's mounted troops, after a two-week march in the rain, reached Kondoa Irangi and on 17 April fought the Germans in the hills.
- Key eventRussians capture TrebizondIn mid-April 1916 the Turks abandoned Trebizond, the chief port of northern Anatolia, without a fight. On 18 April General Lyakhov's Russians entered it.
- Italy announces economic reprisalsOn 16 April 1916 Sonnino announced in the Chamber a decree on reprisals against enemy subjects' property. Trade with Germany was not yet fully banned.
- 18
- Fighting at Beit AiessaOn 17 April 1916 the British took the Turkish position of Beit Aiessa on the Tigris. They beat off a big night counter-attack but lost 1,600 men and stalled.
- US note on the SussexOn 18 April 1916 Washington threatened to break with Germany unless it gave up its present submarine warfare methods. Next day Wilson addressed Congress.
- 19
- British take Kondoa IrangiOn 19 April 1916 the Germans abandoned a burning Kondoa Irangi. Van Deventer's exhausted horsemen took it, but were long stuck there without horses or food.
- Death of Colmar von der GoltzOn 19 April 1916 Field Marshal Colmar von der Goltz, commander of the Ottoman Sixth Army, died of typhus in Baghdad. He did not live to see the fall of Kut.
- 20
- Russian troops in MarseilleOn 20 April 1916 the first men of General Lokhvitsky's 1st Special Infantry Brigade reached Marseille, having come from Moscow via Siberia and the Indian Ocean.
- Sinking of the AudOn 20 April 1916 the Libau, disguised as the Norwegian Aud, brought arms for Irish rebels. The British intercepted her, and on 22 April her crew scuttled her.
- Arrest of Roger CasementOn 21 April 1916 the German U-19 landed Roger Casement on Banna Strand, a beach in Ireland. A few hours later he was detained by the police.
- 24
- Key eventOutbreak of the Easter RisingOn 24 April 1916 the Irish Volunteers and the Citizen Army seized central Dublin. Patrick Pearse read the proclamation of the Irish Republic at the GPO.
- Voyage of the JulnarOn the night of 24/25 April 1916 the steamer Julnar, with 270 tons of food, tried to break through to Kut. At Magasis she fouled a cable and fell to the Turks.
- Mine barrage off the Belgian coastOn 24 April 1916 Admiral Bacon's ships laid a double line of mines and a belt of mine nets off Zeebrugge against the submarines from Flanders.
- 26
- Key eventSykes–Picot AgreementOn 26 April 1916 Russia and France exchanged secret notes. Russia accepted the Anglo-French plan to partition Asiatic Turkey and secured Armenia for itself.
- News of an agreement on prisoners in SwitzerlandThe British chronology records on 26 April 1916 an agreement to send sick prisoners of war to Switzerland. Other sources point to the beginning of May.
- 27
- Martial law in DublinMartial law was declared in Dublin on 25 April 1916. On 27 April Asquith announced its extension to the whole of Ireland and sent General Maxwell there.
- Sinking of the battleship RussellOn 27 April 1916 the British battleship Russell struck mines laid by U-73 off Grand Harbour, Malta. About 125 men were killed.
- 29
- Key eventSurrender of KutOn 29 April 1916 the starving garrison of Kut surrendered to the Turks. After a 147-day siege over 13,000 of Townshend's soldiers and followers were captured.
- Declaration of Le HavreOn 29 April 1916 France, then Britain and Russia, promised Belgium it would keep the Congo within its present borders after the war and receive compensation.
- 30
- End of the Lake Naroch offensiveThe chronology ends the Lake Naroch battle on 30 April 1916. The Russians halted on 30 March, and on 28 April the Germans retook all the lost ground.
- Germany introduces summer timeAt 11 p.m. on 30 April 1916 Germany and Austria-Hungary put their clocks forward an hour. The first summer time in history was meant to save coal and oil.
May
- 03
- Loss of Zeppelin L 20On 3 May 1916 the airship L 20, out of fuel after a raid on Scotland, crashed in a fjord near Stavanger. Norway interned the crew.
- First executions of the Rising's leadersAt dawn on 3 May 1916 Patrick Pearse, Thomas Clarke and Thomas MacDonagh, sentenced by court martial, were shot in Dublin's Kilmainham Gaol.
- 07
- Russians occupy Qasr-e ShirinOn 7 May 1916 Baratov's cavalry entered Qasr-e Shirin on the border with Iraq. It came too late, as Kut had capitulated more than a week earlier.
- Nikola Pašić in RussiaIn early May 1916 Serbian prime minister Nikola Pašić was the Tsar's guest in Petrograd. Contrary to the British chronology, the government stayed on Corfu.
- 09
- Anglo-French exchange of notes on Asia MinorOn 9 May 1916 French ambassador Paul Cambon sent Grey a note with terms for dividing Ottoman lands. It was the French text of the Sykes-Picot Agreement.
- Milne replaces MahonOn 9 May 1916 Gen. George Milne took command of the British Salonika Army. Bryan Mahon sailed for Egypt the same day to command on the Libyan border.
- German attack on Kondoa IrangiOn the night of 9–10 May 1916 Lettow-Vorbeck's askaris stormed van Deventer's positions at Kondoa Irangi several times. Every attack was beaten off.
- 15
- Blockade of the Hejaz coastIn mid-May 1916 British warships began blockading the ports of the Hejaz. The blockade was requested by the Sharif of Mecca himself, who was preparing a revolt.
- Russians take RowanduzIn mid-May 1916 a Russian detachment from Persian Azerbaijan stormed Rowanduz in Kurdistan, a few days' march from Mosul.
- Russians halt before KhanaqinIn mid-May 1916 Baratov stood before Khanaqin but did not take it. The Turks were bringing reinforcements from Kut and the Russians were told not to attack.
- 16
- House of Commons passes conscription of married menOn 16 May 1916 the Commons passed the second Military Service Bill by 250 votes to 35. Conscription was to cover married and single men aged 18 to 41.
- Grey approves the Sykes-Picot AgreementOn 16 May 1916 Edward Grey answered a French note and accepted the plan to partition Ottoman lands, on condition that the Arabs rose against the Turks.
- 23
- Capture of El FasherOn 23 May 1916 Kelly's mounted troops entered the deserted capital of Darfur. Sultan Ali Dinar fled to the hills; John Slessor bombed his men from the air.
- Britain recognises Russian gains in Asia MinorOn 23 May 1916 Edward Grey offered Russia an agreement in which Britain recognised its claims to Erzurum, Trebizond, Van, Bitlis and part of Kurdistan.
- 25
- Northey's troops enter German East AfricaOn 25 May 1916 four columns under General Northey were to surround German posts between Lakes Nyasa and Tanganyika. The Germans escaped from almost all.
- Conscription extended to married menOn 25 May 1916 the second Military Service Act received royal assent. Conscription in Great Britain now covered all men aged 18 to 41.
- 26
- Bulgarians and Germans occupy Fort RupelOn 26 May 1916 Bulgarian and German troops entered Greek Macedonia. Athens forbade resistance, and next day the garrison gave up Fort Rupel on the Struma.
- US note on the search of mailAt the end of May 1916 the USA protested sharply against the British and French removing mail from neutral ships and opening it in London.
- 31
- Key eventStart of the Battle of JutlandOn 31 May 1916 the Grand Fleet and the High Seas Fleet clashed off Jutland. By day the British lost three battlecruisers but cut off the Germans' way home.
- Ottoman troops retake MamahatunAt the end of May 1916 Vehip Pasha surprised the Russians on the Erzincan–Erzurum road. The Turks broke the thinly held front and retook the town of Mamahatun.
- Entente protest over Fort RupelAt the turn of May and June 1916 France and her allies took the surrender of Fort Rupel as the end of Greek benevolent neutrality and warned of consequences.
June
- 02
- Battle of Mount Sorrel beginsOn 2 June 1916, after a hurricane bombardment, Württembergers took Mount Sorrel and Tor Top near Ypres. Gen. Mercer of the 3rd Canadian Division was killed.
- Germans take Fort VauxOn 2 June 1916 the Germans broke into Fort Vaux at Verdun. Major Raynal's garrison held out underground until 7 June, when the water ran out.
- 03
- End of the Trentino offensiveOn 3 June 1916 the Austrians took Monte Cengio, but Cadorna said he would stop them in the mountains. The attack faded, though assaults went on two more weeks.
- Martial law in SalonikaOn 3 June 1916, King Constantine's name day, Gen. Sarrail declared a state of siege. Entente troops seized the offices, post office and telegraph in Salonika.
- 05
- Key eventStart of the Arab RevoltOn 5 June 1916 the sons of the Sharif of Mecca, Ali and Faisal, proclaimed near Medina the Arabs' independence from the Turks. Thus began the Arab Revolt.
- Key eventDeath of KitchenerOn 5 June 1916 the cruiser Hampshire, carrying Lord Kitchener to Russia, struck a mine off Orkney. The war minister died with almost all the crew; 12 survived.
- Ottoman offensive in western PersiaAt the start of June 1916 the whole Ottoman XIII Corps stood at Khanaqin. Baratov's Russians began to fall back, and the Turks moved into Persia.
- 06
- Attack on MedinaOn 6 June 1916 Faisal's Arabs attacked Medina. Fahreddin Pasha's garrison drove them off with artillery fire, and the torn-up Hejaz Railway was soon repaired.
- Pacific blockade of GreeceOn 6 June 1916 Entente warships began stopping Greek ships, and vessels under the Greek flag were held in Allied ports. No one explained the reason to Athens.
- Death of Yuan ShikaiOn 6 June 1916 the Chinese President Yuan Shikai died in Peking. The next day Vice-President Li Yuanhong took office, recognised also by the rebel south.
- 09
- Arabs take JeddahOn 9 June 1916 Arabs of the Harb tribe attacked Jeddah and British warships shelled the port. The Turkish garrison surrendered only on 16 June.
- Fighting at MkaramoOn 9 June 1916 Sheppard's column fought Major Kraut's troops in dense bush on the Pangani. During the night the Germans withdrew towards Handeni.
- 10
- Outbreak of the revolt in MeccaAt dawn on 10 June 1916 Sharif Hussein's men attacked the Turkish garrison of Mecca. The city soon fell to them, but the fort and barracks held out until July.
- Conscription in New ZealandOn 10 June 1916 the New Zealand House of Representatives passed the Military Service Bill by 44 votes to 4. Conscription was to cover men aged 20 to 46.
- 11
- Start of the Battle of the StrypaOn 11 June 1916 the Russian 7th Army, having taken Buczacz, attacked Bothmer's South Army beyond the Strypa. A German counter-attack threw it back at Olesza.
- Salandra resignsOn 10 June 1916 the Italian Chamber refused Salandra's government its confidence after the defeats in Trentino. The cabinet resigned after over two years.
- 12
- British enter KermanIn June 1916 Percy Sykes, after marching from the Persian Gulf, entered Kerman. There he began raising the first brigade of the South Persia Rifles.
- Russians take ZaleszczykiIn June 1916, after the defeat at Okna, the Austrians gave up the Zaleszczyki bridgehead without a fight. A British chronology dates the Russian entry 12 June.
- 21
- Russians take RădăuțiOn 21 June 1916 Petrograd announced the capture of Rădăuți in southern Bukovina. Terek Cossacks had passed through it a day earlier, pursuing the Austrians.
- Entente ultimatum to GreeceOn 21 June 1916 the ministers of France, Britain and Russia demanded that Greece demobilise, form a non-party government and hold elections. Athens gave in.
- Resignation of the Skouloudis governmentOn 21 June 1916, the day the Entente demanded a change of government in Greece, Prime Minister Stefanos Skouloudis resigned after less than eight months.
- Zaimis prime minister of Greece againOn 21 June 1916 King Constantine entrusted the government to Alexandros Zaimis, who accepted all the Entente's demands and formed a cabinet of officials.
- 24
- Austrians driven out of BukovinaBy 24 June 1916 the Russians had taken Kuty and Kimpolung, and the Austrians fell back into the Carpathians, keeping only a strip of Bukovina by Jakobeny.
- Conscription of married men comes into forceOn 24 June 1916 married British men aged 18 to 41 were deemed enlisted in the Army Reserve by virtue of the second Military Service Act.
- 27
- Demobilisation of the Greek armyOn 27 June 1916 the Zaimis government demobilised the Greek army, as the Entente demanded. Released reservists began forming anti-Venizelist leagues.
- Ratification of the economic conference resolutionsIn late June 1916 France's government approved the resolutions of the Paris economic conference. In London they sparked a dispute over the future of free trade.
- Proclamation of the Sharif of MeccaOn 27 June 1916 the Sharif of Mecca issued an appeal to the world's Muslims. He accused the Young Turks of godlessness and proclaimed the Hejaz independent.
- 30
- French retake ThiaumontOn 30 June 1916 the French 248th Infantry Regiment attacked the ruins of the Thiaumont work at Verdun. Sources differ on whether it took it and for how long.
- End of the battle of the StrypaThe British chronology ends the battle of the Strypa on 30 June 1916. Bothmer held the upper Strypa, and Shcherbachev's last big attack had failed on 21 June.
- New agreement with the Netherlands Overseas TrustAt the end of June 1916 London and the Netherlands Overseas Trust extended rationing to further goods, among them cocoa, tin, hides and asbestos.
July
- 01
- Key eventFirst day on the SommeOn 1 July 1916 the British and French attacked on the Somme. The French and the British right succeeded, but the British Army lost 57,000 men.
- Key eventThe Lochnagar mine is blownAt 7.28 a.m. on 1 July 1916 the Lochnagar mine, the largest yet on the Western Front, went up at La Boisselle. The 34th Division's attack still failed.
- First RFC contact patrolsOn 1 July 1916 over the Somme, RFC airmen closely followed the infantry's advance, watching for flares and flashing mirrors. Such trials dated from 1915.
- Ottoman troops retake KermanshahOn 1 July 1916 the Ottoman XIII Corps entered Kermanshah, abandoned overnight by Baratov's Russians. Persian nationalists returned to the city.
- 07
- End of the Italian counter-offensive in the TrentinoOn 7 July 1916 the Austrians on the Asiago plateau repulsed the second day of a major Italian attack. Cadorna did not regain the positions lost in May.
- British occupy TangaOn 7 July 1916 an Indian force entered Tanga unopposed, where the British had been defeated in 1914. The Germans withdrew, wrecking the port and railway.
- Lloyd George becomes Secretary of State for WarIn early July 1916 David Lloyd George succeeded Kitchener at the War Office. Yet he had little influence on strategy, which was decided by General Robertson.
- Declaration of London revokedOn 7 July 1916 Britain and France ceased to apply the 1909 Declaration of London. Control of maritime trade was henceforth to be governed by the law of nations.
- 10
- Submarine Deutschland in AmericaOn 9 July 1916 the unarmed German merchant submarine Deutschland crossed the Atlantic and entered Chesapeake Bay. It brought dyes to Baltimore.
- Russians retake MamahatunIn July 1916 the Russian 39th Division routed the Turks on the Dumanlı Dağ massif and retook Mamahatun, lost to Vehip Pasha at the end of May.
- 14
- Key eventBattle of Bazentin Ridge beginsAt dawn on 14 July 1916, after a night approach and five minutes of shelling, the British took the German second position from Longueval to Bazentin-le-Petit.
- British take MwanzaOn 14 July 1916 Charles Crewe's troops, carried by steamer across Lake Victoria, took Mwanza. The German garrison managed to withdraw to the south.
- Inter-Allied financial conference in LondonOn 14–15 July 1916 Entente representatives met in London on financing the war. Russia sought new British credits for purchases abroad.
- Warsaw city council electionsOn 14 July 1916 voting ended in the Warsaw city council elections called by the German occupiers. Councillors were elected in six curiae.
- 19
- Key eventAttack at FromellesOn the evening of 19 July 1916 British and Australian troops attacked at Fromelles. By morning the 5th Australian Division had lost 5,533 men and held nothing.
- Ottoman offensive across the SinaiOn 19 July 1916 a British airman spotted Kress von Kressenstein's columns in Sinai. Turks and Germans were marching on Romani to shell the Suez Canal.
- 20
- Reports of a new Entente loan to GreeceA British chronology says the Zaimis government concluded an £800,000 loan with the Entente on 20 July 1916. Other sources do not confirm the agreement.
- Dismissal of SazonovOn 20 July 1916 the Tsar dismissed the foreign minister Sazonov, advocate of Polish autonomy. His post went to Stürmer, favourite of the Tsarina and Rasputin.
- 25
- The rebuilt Serbian army returns to the frontOn 25 July 1916 the rebuilt Serbian army went into action on the Salonika front. The Šumadija Division attacked the Bulgarians in the hills above Meglena.
- Russians take ErzincanOn 25 July 1916 the Russian 39th Division entered Erzincan, abandoned by the shattered Ottoman Third Army. It was the peak of Russian gains in Anatolia.
- 27
- Arabs take YanbuOn 27 July 1916 the Turkish garrison of Yanbu, the old Red Sea port of Medina, surrendered to the Sharif's insurgents. Medina lost its nearest port.
- Execution of Captain FryattOn 27 July 1916 a German court martial in Bruges sentenced Captain Charles Fryatt, who in 1915 had tried to ram a U-boat. He was shot that evening.
- 30
- First joint Allied air operationsOn 30 July 1916 No. 3 Wing RNAS aircraft from Luxeuil first flew with the French against Germany. The targets were petrol stores at Müllheim in Baden.
- Russian troops in SalonikaOn 30 July 1916 General Diterikhs's 2nd Special Infantry Brigade began landing at Salonika. Crowds welcomed the Russians on the quays and in the streets.
August
- 03
- Execution of Roger CasementOn 3 August 1916 Roger Casement, convicted of high treason, was hanged in Pentonville Prison in London. The government rejected all pleas for clemency.
- Belgians occupy UjijiIn late July and early August 1916 the Belgian Southern Brigade took Ujiji and Kigoma on Lake Tanganyika, at the end of the German Central Railway, unopposed.
- 06
- Start of the Sixth Battle of the IsonzoOn 6 August 1916 the Italians attacked the Gorizia bridgehead and Monte San Michele. That same day they took Monte Sabotino and the summits of San Michele.
- Ottoman troops retake Muş and BitlisOn 6 August 1916 Mustafa Kemal's XVI Corps drove the Russians from Muş, having forced them out of Bitlis. It was the main success of the Second Army offensive.
- 11
- British take MpwapwaOn 11 August 1916 van Deventer's division entered Mpwapwa after two days of marching and fighting. The German rearguard held the hills and slipped away.
- Russians take Stanisławów againOn the morning of 11 August 1916 Lechitsky's Russian Ninth Army entered Stanisławów, abandoned overnight by the Austrians after a lost four-day battle.
- Italians land at SalonikaOn 11 August 1916 General Petitti di Roreto's Italian 35th Division began disembarking at Salonika. A fifth national contingent joined Sarrail's army.
- 17
- Romania's treaty with the EntenteOn 17 August 1916 in Bucharest Brătianu signed a secret treaty and military convention with the Entente, promising to attack Austria-Hungary by 28 August.
- Battle of Florina beginsOn 17 August 1916 the Bulgarian 1st Army attacked the Serbs in western Macedonia and took Greek Florina the same day, forestalling Sarrail's offensive.
- End of the Sixth Battle of the IsonzoOn 17 August 1916 Cadorna halted the offensive on the Isonzo. After taking Gorizia the Italians spent a week vainly storming the new Austrian defence line.
- Brusilov offensive winds downBy mid-August 1916 Brusilov's attacks on Kovel had stalled. On 17 August he set his armies new objectives, but the offensive was already losing momentum.
- 19
- Sinking of HMS Falmouth and HMS NottinghamOn 19 August 1916 Scheer's fleet sailed for Sunderland and the Grand Fleet put out to meet it. No battle followed, but U-boats torpedoed two cruisers.
- Battle of Florina endsOn 19 August 1916, after a failed counter-attack at Banica, the Serbs withdrew to the hills above Lake Ostrovo. There the Bulgarian offensive began to bog down.
- 23
- Deutschland returns to GermanyOn 23 August 1916 the merchant submarine Deutschland returned from America to the Weser estuary with rubber, nickel and tin. Germans hailed it as a hero.
- Reports of the battle of RajatThe British chronology records a "battle of Rajat" on 23 August 1916. There was fighting in the Kurdish mountains that summer, but histories do not confirm it.
- 24
- Russian counter-offensive at MuşIn late August 1916 the Russians repelled the Ottoman Second Army's offensive and closed on Muş. Reports that Muş and Bitlis were retaken were exaggerated.
- Financial conference at CalaisOn 24 August 1916 at Calais the British and French agreed £150 million of credits for France in return for a loan of £50 million in gold.
- 27
- Key eventRomania declares war on Austria-HungaryOn 27 August 1916 a crown council approved Romania's entry into the war. That evening its envoy handed a note in Vienna and troops crossed the Carpathians.
- Russians enter DobrujaOn 27 August 1916, the day Romania entered the war, the first units of Zayonchkovsky's Russian corps crossed the Danube into Dobruja.
- 28
- Romanian offensive in TransylvaniaOn the night of 27–28 August 1916 three Romanian armies crossed the Carpathian passes. The weak Austro-Hungarian screen fell back deeper into Transylvania.
- Key eventGermany declares war on RomaniaOn 28 August 1916 Germany declared war on Romania, a day after it turned against Austria-Hungary. The surprise at Pless cost Falkenhayn his post.
- Key eventItaly declares war on GermanyOn 27 August 1916 Sonnino sent a declaration through the Swiss government that from 28 August Italy considered itself at war with Germany.
- Maude takes command in MesopotamiaOn 28 August 1916 Gen. Stanley Maude, until then commander of the Tigris Corps, took over the chief command in Mesopotamia from the ailing Gen. Percy Lake.
- 29
- Key eventHindenburg becomes Chief of the General StaffOn 29 August 1916 Wilhelm II dismissed Falkenhayn. Hindenburg became Chief of the General Staff of the Field Army, with Ludendorff as his deputy.
- Romanians take BrașovOn 29 August 1916 the vanguard of the Romanian Second Army entered Brașov, the second-largest city of Transylvania, abandoned by its defenders and officials.
- Vosugh od-Dowleh becomes prime minister of PersiaIn late August 1916 the Sepahsalar's government resigned; Vosugh od-Dowleh, a politician close to the British, became premier and foreign minister.
- British occupy IringaOn 29 August 1916 police of Murray's column, part of Northey's force, entered abandoned Iringa. The Germans withdrew south-east, towards Mahenge.
- 30
- Key eventTurkey declares war on RomaniaOn 30 August 1916 Turkey announced that, together with Germany and Bulgaria, it was declaring war on Romania. Enver Pasha was readying a corps for Dobruja.
- Romania breaks off relations with BulgariaOn the evening of 30 August 1916 the Romanian minister in Sofia asked for his passports and broke off ties. Two days later Bulgaria declared war on Romania.
- Venizelist coup in SalonikaOn 30 August 1916 Venizelos's supporters set up a Committee of National Defence in Salonika and renounced obedience to Athens. Sarrail did not stop them.
September
- 01
- Key eventBulgaria declares war on RomaniaOn 1 September 1916 Bulgaria declared war on Romania to regain the Dobruja lost in 1913. Tsar Ferdinand called for a fight against the "treacherous neighbour".
- Romanians outside HermannstadtOn 1 September 1916 Romanian troops stood a few km from almost defenceless Hermannstadt, and burghers offered its surrender. The Romanians did not enter.
- Russo-British agreement on Asia MinorOn 1 September 1916 the Russian ambassador in London confirmed in a note to Grey the Anglo-Russian deal on dividing Asiatic Turkey. He raised one reservation.
- Conscription comes into force in New ZealandOn 1 September 1916 the Governor of New Zealand proclaimed enrolment for the Expeditionary Force Reserve. The Military Service Act began to work in practice.
- Allies seize German ships at PiraeusOn 1 September 1916 an Entente squadron anchored off Salamis and seized German and Austrian ships at Piraeus. Next day the envoys demanded telegraph control.
- 02
- Central Powers enter DobrujaOn the night of 1–2 September 1916 Toshev's Bulgarian 3rd Army crossed the Dobruja border along its whole length and split the Romanian garrisons apart.
- Key eventAirship raid and the downing of SL 11On the night of 2–3 September 1916, 16 airships set out for London. Lieutenant Leefe Robinson shot down SL 11 over Cuffley, and the rest of the raid collapsed.
- 03
- Key eventBattle of Guillemont beginsOn 3 September 1916 British and Irish troops took Guillemont on the Somme in under three hours, after it had been fought for in vain since late July.
- Battle of Delville Wood endsOn 3 September 1916, by British naming, the Battle of Delville Wood ended. An attack on the wood's eastern edge, supporting an assault on Ginchy, failed.
- End of the Battle of Pozières RidgeOn 3 September 1916 the Australians attacked Mouquet Farm for the last time. They held it for a few hours, but kept only a stretch of trench on the ridge.
- 04
- British occupy Dar es SalaamOn 4 September 1916 Dar es Salaam, capital of German East Africa, surrendered without a fight to a British squadron and to columns that had come from Bagamoyo.
- Romanians take OrsovaOn 4 September 1916 the Austrians left the west bank of the Cerna and Dragalina's Romanian 1st Division took Orsova, having broken through on 1 September.
- 06
- The Bulgarians take TutrakanOn 6 September 1916 the Romanian fortress of Turtucaia (Tutrakan) capitulated. Its commandant fled across the Danube, and about 28,000 soldiers were captured.
- End of the Battle of GuillemontThe Battle of Guillemont ended on 6 September 1916. The British took Falfemont Farm and Leuze Wood and linked up with the French, but did not take Ginchy.
- 07
- Action at KisakiOn 7–8 September 1916 two of Smuts's columns attacked the Germans separately at Kisaki, south of the Uluguru Mountains. Both were repulsed; the pursuit stalled.
- British occupy KilwaOn 7 September 1916 British ships landed troops at Kilwa Kisiwani and Kilwa Kivinje, south of Dar es Salaam. Both ports were taken almost without a fight.
- 11
- Zaimis resignsOn 11 September 1916 the Greek prime minister Alexandros Zaimis resigned. Talks on entering the war had stalled, and French pressure on Athens kept growing.
- Surrender of the Greek IV Corps at KavalaOn 11 September 1916 the Greek IV Corps, trapped in Kavala, gave itself up to the Germans to avoid Bulgarian captivity. The Bulgarians took the town next day.
- 15
- Key eventStart of the Battle of Flers-CourceletteOn 15 September 1916 tanks went into battle for the first time, on the Somme. The British took Flers, Martinpuich and High Wood; the Canadians took Courcelette.
- Aircraft co-operate with tanksOn 15 September 1916 RFC airmen followed the first tanks in battle on the Somme. They sent the famous report of a tank driving up the main street of Flers.
- 17
- British occupy LindiOn 17 September 1916 British warships landed the Indian 40th Pathans at Lindi. Soon the whole coast of German East Africa was in British hands.
- Allies retake FlorinaOn 17 September 1916 French and Russian troops entered Florina, taken by the Bulgarians a month before. The Serbian victory at Gornichevo opened the way.
- Richthofen's first victoryOn 17 September 1916, in the first fight of Boelcke's squadron, Manfred von Richthofen downed a British F.E.2b near Cambrai, the first of his 80 victories.
- 19
- Belgians occupy TaboraOn 19 September 1916 Belgian colonial troops entered Tabora, abandoned by the Germans overnight. The British marching on the town learned of it 6 days later.
- Blockade of the coast of Greek MacedoniaIn September 1916 the Allies declared a blockade of the Greek coast from the Struma to the Mesta, held by the Bulgarians. It also covered Kavala and its gulf.
- 22
- End of the Battle of Flers–CourceletteOn 22 September 1916 the Battle of Flers–Courcelette ended. After a week of fighting in rain and mud the British were preparing to attack Morval and Thiepval.
- The Arabs take TaifOn 22 September 1916, after a three-month siege, the Turkish garrison of Ta'if surrendered to Emir Abdullah. Hejaz governor Ghalib Pasha was captured.
- 25
- Key eventStart of the Battle of MorvalOn 25 September 1916 the British Fourth Army attacked on the Somme at noon and took Morval and Lesbœufs in three hours. At Gueudecourt the attack failed.
- Venizelos leaves AthensOn the night of 24–25 September 1916 Eleftherios Venizelos and Admiral Kountouriotis secretly sailed from Athens to Crete to lead the National Defence movement.
- 26
- Key eventStart of the Battle of Thiepval RidgeOn 26 September 1916 the Reserve Army attacked Thiepval Ridge on the Somme. The 18th Division broke into Thiepval and the 11th at last took Mouquet Farm.
- Battle of Hermannstadt beginsOn 26 September 1916 the German Ninth Army attacked the Romanians at Hermannstadt, and the Alpenkorps came down onto the Red Tower Pass road behind them.
- Venizelos forms a provisional government on CreteOn 26 September 1916 Venizelos and Admiral Kountouriotis landed on Crete and formed a provisional government at Chania, opposed to the government in Athens.
- 28
- End of the Battle of MorvalOn 28 September 1916 the Battle of Morval died down. The British held the villages taken and handed part of the front to the French, but could not go on.
- End of the Battle of Thiepval RidgeOn 28 September 1916 the British broke into the Schwaben Redoubt above Thiepval. The Germans, however, held part of the redoubt until mid-October.
October
- 01
- Key eventStart of the Battle of the Transloy RidgesOn 1 October 1916 the British Fourth Army attacked on the Somme at Eaucourt l’Abbaye and the Flers Line, aided by tanks and New Zealanders. Next day it rained.
- Key eventStart of the Battle of the Ancre HeightsOn 1 October 1916 the Canadians attacked Regina Trench beyond the Thiepval ridge on the Somme. Uncut wire and German marines repelled almost the whole assault.
- Shooting down of airship L 31On the night of 1–2 October 1916 Wulstan Tempest shot down L 31 near Potters Bar, killing Heinrich Mathy, the most famous German airship commander.
- 09
- Start of the Eighth Battle of the IsonzoFrom dawn on 9 October 1916 Italian guns pounded Austrian positions on the Karst. Austria saw it as the start of the battle; the assault came a day later.
- Central Powers retake BrașovOn 9 October 1916, after two days of street fighting, German and Hungarian troops took Brașov. The Romanian Second Army fell back at night to the passes.
- Venizelos arrives in SalonikaOn 9 October 1916 Eleftherios Venizelos arrived in Salonika and, with Admiral Kountouriotis and General Danglis, headed the government of National Defence.
- Terauchi becomes prime minister of JapanOn 9 October 1916 Marshal Masatake Terauchi, Governor-General of Korea, replaced Ōkuma as head of Japan's government. His cabinet did not rest on the parties.
- 10
- Entente ultimatum on the Greek fleetOn 10 October 1916 Admiral Dartige du Fournet demanded Greece's light warships, the disarming of its large ones and control of Piraeus, police and railway.
- Lambros becomes prime minister of GreeceOn 10 October 1916 the historian Spyridon Lambros took office in Athens. His cabinet of officials and professors at once faced a French admiral's ultimatum.
- 20
- Explosion of the battleship Imperatritsa MariyaOn 20 October 1916 the dreadnought Imperatritsa Mariya, flagship of the Black Sea Fleet, blew up and sank at Sevastopol. More than 200 sailors were killed.
- Boulogne conference on GreeceOn 20 October 1916 the leaders of Britain and France met at Boulogne to discuss Greece. They did not recognise Venizelos's government but agreed to fund it.
- 22
- Bulgarians and Germans take ConstanțaOn 22 October 1916, after three days of Mackensen's offensive in Dobruja, Bulgarian and German troops entered Constanța, Romania's main port.
- End of the fighting in the Dakhla OasisOn 22 October 1916 the British finished combing the Dakhla Oasis. More than 130 men of the Senussi order were taken prisoner; the rest fled west.
- 28
- Körber becomes Austrian prime ministerOn 28 October 1916, a week after Stürgkh was killed, Franz Joseph I made Ernest von Körber, head of government in 1900–1904, prime minister of Austria.
- Loss of the hospital ship GalekaOn 28 October 1916 the British hospital ship Galeka struck a mine laid by UC-26 off Le Havre. 19 orderlies were killed and the wreck went ashore.
- Death of Oswald BoelckeOn 28 October 1916 over the Somme Oswald Boelcke, creator of fighter tactics and a 40-victory ace, was killed in a collision with a squadron comrade.
November
- 11
- End of the Battle of the Ancre HeightsOn the night of 10–11 November 1916 the 4th Canadian Division took the rest of Regina Trench. After six weeks the whole Thiepval ridge was in British hands.
- British enter ShirazOn 11 November 1916 Percy Sykes's column, after marching from Isfahan, entered Shiraz, a year after pro-German gendarmes had driven the British out.
- 13
- Key eventCapture of Beaumont-HamelOn 13 November 1916, in fog, Scots of the 51st Division took Beaumont-Hamel, where the Newfoundlanders had bled on 1 July. At Serre the attack failed again.
- Central Powers retake OrsovaOn 13 November 1916, after three days of street fighting, the Romanians left Orsova on the Danube for the far bank of the Cerna. It returned to Austria-Hungary.
- 15
- Paris and Chantilly conferencesOn 15–16 November 1916 Allied commanders at Chantilly drew up the war plan for 1917, and politicians meeting at the same time in Paris in effect adopted it.
- Start of the British advance on El ArishThe chronology dates to 15 November 1916 the nominal start of the march across Sinai to El Arish. There was no single event: railway and pipeline set the pace.
- Fourth skirmish at Hafiz KorOn 15 November 1916 guns and aircraft broke up a Mohmand gathering at Hafiz Kor. The tribes had tried to hinder the building of a blockade line.
- 18
- Key eventEnd of the Battle of the SommeOn 18 November 1916, in the first snowstorm of winter, the British attacked on the Ancre for the last time. After four and a half months the Somme was over.
- End of the Battle of the AncreOn 18 November 1916, in the first snowstorm, Canadians and British attacked Desire Trench and Grandcourt on the Ancre. At Serre the attack failed again.
- 19
- Allies take BitolaOn 19 November 1916 French and Serbian cavalry, followed by French and Russian infantry, entered Bitola. It was the first Serbian town recovered from the enemy.
- Entente demands expulsion of Central Powers envoys from AthensOn 19 November 1916 Admiral Dartige du Fournet ordered the German, Austrian, Bulgarian and Turkish ministers out of Greece, three days after demanding arms.
- 21
- Key eventDeath of Franz JosephOn 21 November 1916 the 86-year-old Emperor Franz Joseph I died at Schönbrunn after almost 68 years on the throne. His great-nephew Charles I succeeded him.
- Germans take CraiovaOn 21 November 1916 German cavalry and infantry entered Craiova, the capital of Oltenia, unopposed. The Romanians gave up the city with large stocks of flour.
- Sinking of the hospital ship BritannicOn 21 November 1916 the hospital ship Britannic, sister ship of the Titanic, struck a mine off Kea and sank in 55 minutes. Thirty people died.
- Motono becomes Foreign Minister of JapanOn 21 November 1916 Prime Minister Terauchi handed the foreign ministry to Viscount Ichirō Motono, Japan's representative in Russia for ten years.
- 22
- Resignation of JagowOn 22 November 1916 Gottlieb von Jagow left the head of German diplomacy, officially for his health, in reality over the dispute about submarine warfare.
- Zimmermann becomes foreign secretaryOn 22 November 1916 Arthur Zimmermann of Marggrabowa took charge of German diplomacy, the first commoner ever to head the Reich's Foreign Office.
- 23
- Key eventProvisional government declares war on Germany and BulgariaOn 23 November 1916 Venizelos's National Defence government in Salonika declared war on Germany and Bulgaria. Greece now had two governments, one at war.
- Mackensen crosses the DanubeOn 23 November 1916, in fog, German, Bulgarian and Austro-Hungarian troops crossed the Danube from Svishtov to Zimnicea and set off for Bucharest.
- Hospital ship Braemar Castle damagedOn 23 November 1916 the British hospital ship Braemar Castle, carrying wounded from Salonika, struck a mine off Mykonos. Four died and the ship was beached.
- Möwe sails on her second cruiseOn 23 November 1916 the raider Möwe set out on her second cruise, to break through the British blockade into the Atlantic again. It was her most successful.
- 26
- German destroyer raid off the Suffolk coastOn the night of 26 November 1916 German destroyers from Flanders approached the Suffolk coast, sank the armed trawler Narval and took her crew prisoner.
- Sinking of the battleship SuffrenOn 26 November 1916 the German U-52 torpedoed the French battleship Suffren off Portugal. The ship blew up and sank within seconds with all hands.
- 30
- Allies land at PiraeusOn the night of 30 November to 1 December 1916 about 3,000 Entente soldiers and sailors landed at Piraeus to force the Greeks to hand over their weapons.
- Wolf sets out on her cruiseOn 30 November 1916 Karl August Nerger's raider Wolf, a disguised freighter meant to lay mines and sink ships in the Indian Ocean, sailed from Kiel.
December
- 01
- Fighting in AthensOn 1 December 1916 Greek troops fired on the Entente landing party in Athens and French ships shelled the city. In the evening the king gave up six batteries.
- Start of the Battle of the ArgeșOn 1 December 1916 General Prezan’s Romanian strike group hit the flank of the Danube Army near Bucharest. But the Germans captured the Romanian battle plan.
- Romanian government moves to IașiIn late November and early December 1916 the ministries, court and Allied legations left Bucharest for Iași. Brătianu's cabinet left on 3 December.
- Turnip winterOn 1 December 1916 the Reich government cut the potato allowance to a pound a day, and from January to three-quarters of a pound. The turnip winter began.
- 02
- Trepov proclaims Russia's right to ConstantinopleOn 2 December 1916 Premier Alexander Trepov revealed in the Duma that the Allies had granted Russia Constantinople and the Straits. It was coolly received.
- Massacre of Venizelists in AthensOn 2 December 1916, after the Entente landing force left, royalists in Athens attacked supporters of Venizelos. People were killed; a round-up began next day.
- 03
- The Clémentel agreementOn 3 December 1916 London and Paris signed a shipping agreement. Britain promised France fixed tonnage, and a joint bureau was to charter neutral ships.
- Bombardment of FunchalOn 3 December 1916 the German U-38 entered the Funchal roads on Madeira, sank three Allied ships and a barge, and then shelled the town with her deck gun.
- 05
- End of the Battle of the ArgeșOn 5 December 1916 King Ferdinand approved a general retreat east. The Romanians declared Bucharest an open city and chose to give it up without a fight.
- Resignation of AsquithIn early December 1916 a dispute over the War Committee brought down Asquith's government. Beaten by Lloyd George and the Tories, he resigned on 5 December.
- 06
- Key eventFall of BucharestOn 6 December 1916 Falkenhayn's and Mackensen's troops entered Bucharest unopposed. Ploiești fell the same day, and the cut-off Cerna Group laid down its arms.
- Decree establishing the Provisional Council of StateOn 6 December 1916 Beseler and Kuk's decree on the Provisional Council of State was published. Its Polish members, named by the occupiers, were only to advise.
- 08
- Blockade of GreeceAt 8 a.m. on 8 December 1916 the Entente began a blockade of royalist Greece's coast, announced the day before, to last until amends were made for Athens.
- Opening of the Murmansk railwayOn 8 December 1916 the Murmansk railway was officially opened. Built in under two years, partly by prisoners of war, it linked Petrograd with an ice-free port.
- 11
- Lloyd George's coalition governmentOn 11 December 1916 the press published Lloyd George's government. Grey left the Foreign Office for Balfour, Derby took the War Office and Carson the Admiralty.
- End of the battle of the CrnaOn 11 December 1916 the Allies broke off their offensive in Macedonia. The last Serbian and Russian attacks on Hill 1050 in the Crna bend decided nothing.
- Sinking of the battleship Regina MargheritaOn the night of 11–12 December 1916 the Italian battleship Regina Margherita struck mines leaving the Bay of Vlorë. About 675 men were killed.
- 12
- Key eventGerman peace offerOn 12 December 1916 Germany and her allies proposed peace negotiations to the Entente. The note contained no terms, but plenty of boasting.
- Nivelle becomes commander-in-chiefOn 12 December 1916 Briand reshaped his government and set up a five-man war committee. Nivelle replaced Joffre in command of the French armies in France.
- 13
- Start of the British offensive on KutOn 13 December 1916 the British shelled the Turkish positions at Kut and at night moved towards the Shatt al-Hai. Maude began the offensive to retake the town.
- Körber resignsOn 13 December 1916 Austrian Prime Minister Ernest von Körber resigned; Emperor Karl I accepted. They disagreed over parliament and concessions to Hungary.
- Pokrovsky becomes Russian foreign ministerOn 13 December 1916 Nicholas II appointed the State Comptroller Nikolai Pokrovsky foreign minister. He was the last head of tsarist diplomacy.
- 15
- Greece accepts the December ultimatumOn 15 December 1916 the government in Athens accepted the Entente ultimatum and began withdrawing troops from Thessaly to the Peloponnese. The blockade went on.
- Britain recognises Hussein as King of the HejazIn December 1916 Britain, France and Russia recognised Sharif Hussein as King of the Hejaz, but not as King of the Arabs, as he styled himself.
- Barbusse's Under Fire wins the Prix GoncourtOn 15 December 1916 the Prix Goncourt went to Henri Barbusse's Under Fire, a stark picture of a French squad in the trenches, by a volunteer from the front.
- 18
- Key eventWilson's peace noteOn 18 December 1916 President Wilson asked all the belligerents to state on what terms they were ready to end the war. The Allies took offence.
- Key eventEnd of the Battle of VerdunOn 18 December 1916 Zouaves retook Les Chambrettes farm, ending Mangin's December attack and the Battle of Verdun, under way since February, the war's longest.
- 19
- Lloyd George's first speech as prime ministerOn 19 December 1916 Lloyd George rejected the German peace offer in the Commons and announced universal national service and an imperial conference.
- Britain recognises the Venizelos governmentOn 19 December 1916 Lloyd George announced in the Commons that Britain would receive representatives of Venizelos's government. France followed London's lead.
- 21
- British occupy El ArishAt dawn on 21 December 1916 Anzac horsemen surrounded El Arish in Sinai. The Turks had left the day before and the town was taken unopposed.
- Seeadler sets sailOn 21 December 1916 Felix von Luckner's sailing ship Seeadler put to sea disguised as a Norwegian timber ship. She was the third raider sent out that winter.
- 22
- New ministries in BritainOn 22 December 1916 the King gave assent to Acts creating British ministries of food, shipping, labour and pensions. Lord Devonport took charge of food.
- Czernin becomes foreign ministerOn 22 December 1916 Emperor Charles I appointed Count Ottokar Czernin, formerly minister in Bucharest, foreign minister of Austria-Hungary in place of Burián.
- 25
- Nicholas II's order on PolandOn 25 December 1916 Tsar Nicholas II, in an order to the army and navy, listed among Russia's war aims the creation of a free Poland from all three partitions.
- Anathema against VenizelosOn 25 December 1916 Archbishop Theoklitos of Athens cursed Venizelos on the Field of Ares. The crowd stoned a cairn meant as a monument to the "traitor".
- 26
- Central Powers reply to Wilson's noteOn 26 December 1916 Germany, Austria-Hungary and Turkey, and on 30 December Bulgaria, answered Wilson. They proposed a conference but named no terms.
- London conference on the peace notesOn 26–28 December 1916 British and French ministers met in London to discuss the reply to the peace notes, Salonika and the Nivelle plan.
- Joffre becomes Marshal of FranceOn 26 December 1916 Joffre gave up the last of his authority over the army and was made Marshal of France, the first since 1870. It was a consolation prize.
- 27
- Sinking of the battleship GauloisOn 27 December 1916 the German UB-47 torpedoed the French battleship Gaulois east of Kythira. The ship sank, but only four sailors were killed.
- Anglo-French agreement on TogolandOn 27 December 1916 London and Paris agreed on the provisional administration of conquered Togoland, dividing it into two separate administrative zones.
- 30
- Entente rejects the German peace offerOn 30 December 1916 ten Entente states rejected the Central Powers' offer in a joint note. They called it a war manoeuvre rather than a peace proposal.
- Chinese labourers in FranceAt the end of 1916 the British, following the French, turned to labourers from China. By 1918 over 100,000 of them were working behind the front in France.
- Key eventMurder of RasputinBefore dawn on 30 December 1916 aristocratic plotters in Petrograd killed Grigori Rasputin, the imperial couple's favourite, and sank his body in the Neva.