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Dates
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Events
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January 5–January 17
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Austro-Hungarian offensive against Montenegro, which capitulates.
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January 6-January 7
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Battle of Mojkovac
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January 6-January 8
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Battle of Sheikh Sa'ad, a phase of the First Siege of Kut.
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January 9
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The Gallipoli Campaign ends in an Allied defeat and an Ottoman victory.
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January 10–February 16
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Battle of Erzurum.
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January 11
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Corfu occupied by the Allies.
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January 13
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Battle of Wadi, a phase of the First Siege of Kut.
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January 21
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Battle of Hanna, a phase of the First Siege of Kut.
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January 24
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Reinhard Scheer is appointed commander of Germany's Hochseeflotte.
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January 27
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Conscription introduced in the United Kingdom by the Military Service Act.
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February 5-April 15
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Trebizond Campaign.
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February 12
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Battle of Salaita Hill.
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February 21
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The Battle of Verdun begins.
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February 26
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Battle of Agagia, Senussi rebellion suppressed by the British.
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February 28
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German Kamerun (Cameroon) surrenders.
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March 1
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Germany resumes unrestricted submarine warfare.
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March 1–March 15
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Fifth Battle of the Isonzo.
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March 2-August 4
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Battle of Bitlis.
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March 8
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Battle of Dujaila: a British attempt to relieve Kut failed.
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March 9
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Germany declares war on Portugal. Portugal officially enters the war.
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March 11-March 12
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Battle of Latema Nek.
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March 18
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Battle of Kahe.
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March 18–April
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Lake Naroch Offensive.
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April 24-April 29
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Easter Rising by Irish rebels for independence from the United Kingdom.
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April 27-April 29
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Gas attack at Hulluch.
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April 29
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The British forces under siege at Kut surrender to the Ottomans, first siege of Kut ends.
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May 7-May 10
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Battle of Kondoa Irangi.
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May 10
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Germany suspends unrestricted submarine warfare.
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May 15–June 10
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Austro-Hungarian Strafexpedition in Trentino.
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May 31–June 1
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Battle of Jutland between Britain's Grand Fleet and Germany's Hochseeflotte.
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June 2-June 14
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Battle of Mont Sorrel.
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June 4
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The Brusilov Offensive begins.
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June 5
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The Arab Revolt in Hejaz begins.
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The HMS Hampshire is sunk off the Orkney Islands; Lord Kitchener dies.
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June 10
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Italy: Paolo Boselli succeeds Antonio Salandra as Prime Minister.
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The Siege of Medina begins.
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June 10-July 4
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Battle of Mecca, Arabs capture the city.
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June 30
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Battle of the Boar's Head, diversion from the Battle of the Somme which began the next day.
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July
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Battle of Taif.
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July 1
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The Battle of the Somme begins.
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July 1-July 13
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Second Battle of Albert (Opening phase of the Battle of the Somme).
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July 1-July 2
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British capture Fricourt during the Second Battle of Albert.
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July 2-July 25
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Battle of Erzincan.
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July 3-July 7
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British and French capture La Boisselle during the Second Battle of Albert.
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July 3-July 12
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British and French capture Mametz Wood during the Second Battle of Albert.
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July 3-July 17
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British capture Ovillers during the Second Battle of Albert and Battle of Bazentin Ridge.
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July 4-July 6
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Battle of Kostiuchnowka.
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July 7-July 11
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Allies capture Contalmaison during the Second Battle of Albert.
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July 8-July 14
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British capture Trônes Wood during the Second Battle of Albert.
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July 14-July 17
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Battle of Bazentin Ridge (Initial phase of the Battle of the Somme)
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July 14-September 15
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Battles for Longueval and Delville Wood (Initial phase of the Battle of the Somme)
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July 19-July 20
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Battle of Fromelles (Initial phase of the Battle of the Somme).
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July 23–August 7
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Battle of Pozières (Initial phase of the Battle of the Somme)
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July 24-August 8
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Battle of Kowel.
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August 3–August 5
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Battle of Romani. Ottoman attack on the British in the Sinai peninsula fails.
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August 6–August 17
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Sixth Battle of the Isonzo. The Italians capture Gorizia (August 9).
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August 6
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Battle of Doberdo, part of the Sixth Battle of Isonzo.
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August 9-August 18
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First battle of Doiran.
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August 24
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Battle of Mlali.
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August 27
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Italy declares war on Germany.
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Romania enters the war on the Entente's side. Her army is defeated in a few weeks.
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August 27-December
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Conquest of Romania by Central Powers.
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August 27-November 26
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Battle of Transylvania, a phase of the conquest of Romania.
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August 29
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Paul von Hindenburg replaces Erich von Falkenhayn as German Chief of Staff.
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September 2-September 6
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Battle of Turtucaia, a phase of the conquest of Romania.
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September 3-September 6
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Battle of Guillemont (intermediate phase of the Battle of the Somme)
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September 5-September 7
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Battle of Dobrich, a phase of the conquest of Romania.
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September 6
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The Central Powers create a unified command.
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September 7-September 11
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Battle of Kisaki.
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September 9
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Battle of Ginchy (intermediate phase of the Battle of the Somme)
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September 12–December 11
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Monastir Offensive, set up of the Salonika Front.
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September 12-September 14
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Battle of Malka Nidzhe, a phase of the Monastir Offensive.
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September 12-September 30
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Battle of Kaymakchalan, a phase of the Monastir Offensive.
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September 14–September 17
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Seventh Battle of the Isonzo
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September 15-September 22
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Battle of Flers-Courcelette (last offensive of the Battle of the Somme). The British use armored tanks for the first time in history.
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September 17-September 19
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First Battle of Cobadin, a phase of the conquest of Romania.
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September 20
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The Brusilov Offensive ends with a substantial Russian success.
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September 25-September 28
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Battle of Morval (part of the final stages of the Battle of the Somme)
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September 26–September 28
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Battle of Thiepval Ridge (part of the final stages of the Battle of the Somme)
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September 29-October 5
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Flamanda Offensive, a phase of the conquest of Romania.
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October–November
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First Battle of the Cerna Bend, a phase of the Monastir Offensive.
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October 1–November 5
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Battle of Le Transloy (part of the final stages of the Battle of the Somme)
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October 1-November 11
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Battle of Ancre Heights (part of the final stages of the Battle of the Somme).
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October 9–October 12
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Eighth Battle of the Isonzo.
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October 19-October 25
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Second Battle of Cobadin, a phase of the conquest of Romania.
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October 24
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The French recapture Fort Douaumont near Verdun.
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November 1–November 4
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Ninth Battle of the Isonzo.
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November 13–November 18
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Battle of the Ancre (closing phase of the Battle of the Somme)
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November 18
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The Battle of the Somme ends with enormous casualties and no winner.
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November 21
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HMHS Britannic sinks after hitting a German mine
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Francis Joseph I, Emperor of Austria and King of Hungary, dies and is succeeded by Charles I.
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November 25
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David Beatty replaces John Jellicoe as commander of the Grand Fleet. Jellicoe becomes First Lord of the Sea.
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November 25-December 3
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Battle of Bucharest, a phase of the conquest of Romania.
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November 28
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Prunaru Charge, a phase of the Battle of Bucharest, Romanian cavalry desperately charge into enemy lines.
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December 1
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Battle of the Arges, a phase of the Battle of Bucharest.
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December 1-January 18, 1917
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Allies capture Yanbu.
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December 5–December 7
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United Kingdom: Prime Minister Henry Asquith resigns and is succeeded by David Lloyd George.
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December 6
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The Germans occupy Bucharest. The capital of Romania moved to Iaşi.
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December 13
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Robert Nivelle replaces Joseph Joffre as Commander-in-Chief of the French Army.
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December 23
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Battle of Magdhaba in the Sinai peninsula.
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December 23-December 29
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Christmas Battles.
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December 27
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Togoland is divided into British and French administrative zones.
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December 29
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Grigori Rasputin, Russia's éminence grise, is assassinated.
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