Timeline
1914
1915
1916
1917
1918
1919
1920

June July August August August September October November December
28 Assassination of Archduke Franz Ferdinand in Sarajevo

 

23 Austro-Hungarian ultimatum to Serbia
28 Austria-Hungary declares war on Serbia
30 Tsar Nicholas II orders the general mobilisation of the Russian army
1 Germany declares war on Russia
2 German ultimatum to Belgium
3 Germany declares war on France
4 Germany invades Belgium. Britain declares war on Germany
7 British Expeditionary Force (BEF) under Sir John French lands in France
Russian forces invade East Prussia
8 First Defence of the Realm Act (DORA)
10 Britain declares war on Austria-Hungary
16 German capture of Liège
18 Russian invasion of Galicia
20 German capture of Brussels
23 Japan declares war on Germany
23-24 Battle of Mons
23 Battle of Lemberg starts (ends 1 Sep)

26

Surrender of German forces in Togoland

26-31 Battle of Tannenberg
27 German capture of Lille
28 Battle of Heligoland Bight
5-10 Battle of the Marne
9-14 1st Battle of Masurian Lakes

 

13 German light cruiser Magdeburg runs aground in the Gulf of Finland. The German navy code book is retrieved from the wreck by the Russians.
19 1st Battle of Ypres starts (ends 17 Nov)
29 Turkey enters the war on the side of the Central Powers
1 Battle of Coronel
3 Britain establishes the North Sea as a 'military zone'
7 British landing in Mesopotamia
7 Anglo-Japanese forces capture Tsingtau
21-23 British capture Basra
8 Battle of the Falklands
16 German bombardment of NE English coast
25 Unofficial truce between British and German soldiers on the Western Front
29 Battle of Sarikamish starts (ends 3 Jan 1915)

1914
1915
1916
1917
1918
1919
1920