Timeline
1914
1915
1916
1917
1918
1919
1920

January February March April May June July August September October November December
19 First Zeppelin raids on England
24 Battle of Dogger Bank
31 Battle of Bolimov starts (ends 2 Feb): first small-scale use of poison gas in battle
7-22 2nd Battle of Masurian Lakes (the 'Winter Battle')
19 First naval bombardment of the Dardanelles by Anglo-French forces
25 Second naval bombardment of the Dardanelles by Anglo-French forces
10-13 Battle of Neuve Chapelle
18 Unsuccessful Allied naval attack on the Dardanelles
20 British promise Constantinople to Russia at the end of the war
22 Russians capture Przemysl
12-14 British capture Kurna
20 Beginning of Armenian 'revolt' in Van
22 2nd Battle of Ypres starts (ends 25 May): first large-scale use of poison gas in battle
25 First Allied landings on the Gallipoli peninsula
26 Italy signs the Treaty of London
2 Start of Austro-German Gorlice-Tarnow offensive
7 Sinking of the Lusitania
23 Italy declares war on Austria-Hungary
25 British war coalition formed under Asquith
31 First Zeppelin raid on London
1 Employment of first women in British munitions factories
3 Austro-German forces recapture Przemysl
5 Beginning of Arab revolt against the Turks

5 German capture of Warsaw
6 British landings at Suvla Bay
6-9 Anzac offensive at Lone Pine, Gallipoli
25 Austro-German capture of Brest-Litovsk
18-19 German capture of Vilna
23 Bulgaria joins the war on the side of the Central Powers
25 Battle of Loos starts (ends 8 Oct)
28 British capture of Kut
5 Anglo-French landing at Salonika
6 Austro-German invasion of Serbia
8-9 Austrian capture of Belgrade
11 Bulgarian invasion of Serbia
12 Execution of Edith Cavell
22-26 Battle of Ctesiphon
27 Founding of No-Conscription Fellowship
2 Central Powers occupy Serbia
7 Beginning of Turkish siege of besieged British troops at Kut
19 Haig replaces French as head of the BEF
19-20 Evacuation of Allied positions on Gallipoli at Anzac Cove and Suvla Bay

1914
1915
1916
1917
1918
1919
1920