| Assassination of Archduke Ferdinand |
28th June, 1914 |
| Austra-Hungary demands Serbia arrest the leaders of the Black Hand |
23rd July, 1914 |
| Serbia appeals to Russia for help |
24th July, 1914 |
| Austria-Hungary declares war on Serbia |
28th July, 1914 |
| Germany declares war on Russia |
1st August, 1914 |
| Germany declares war on France |
3rd August, 1914 |
| Moltke orders the Schlieffen Plan to proceed |
4th August, 1914 |
| German troops enter Belgium |
4th August, 1914 |
| Great Britain declares war on Germany |
4th August, 1914 |
| Lord Kitchener calls for 100,000 men to join British Army |
7th August, 1914 |
| Big Bertha used against Liege Forts |
12th August, 1914 |
| Austro-Hungarian troops invade Serbia |
12th August, 1914 |
| French troops enter Lorraine |
14th August, 1914 |
| British Expeditionary Force arrives in France |
22nd August, 1914 |
| Battle of Mons begins |
23rd August, 1914 |
| French Army abandons Plan 17 |
24th August, 1914 |
| Battle of Tannenberg begins |
26th August, 1914 |
| Battle of Heligoland |
28th August, 1914 |
| War Propaganda Bureau Writers Conference |
2nd Sept., 1914 |
| Battle of the Marne begins |
6th Sept., 1914 |
| French troops attack German Army at the River Aisne |
13th Sept., 1914 |
| Battle of Albert |
25th Sept., 1914 |
| Battle of Arras |
1st October, 1914 |
| First German aircraft shot down by Allied plane |
5th October, 1914 |
| Battle of Ypres |
15th October, 1914 |
| Canadian troops arrive in Britain |
16th October, 1914 |
| Turkey joins Central Powers |
29th October, 1914 |
| Anglo-Indian invasion of Mesopotamia |
21st November, 1914 |
| Farman MF-11 carries out first night bombing raid |
21st December, 1914 |
| Christmas Truce on the Western Front |
25th December, 1914 |
| South African forces occupy Swakopmund |
14th January, 1915 |
| Battle of Dogger Bank |
24th January, 1915 |
| BEF attacks at Neuve Chapelle |
10th March, 1915 |
| Allied naval attack on the Dardanelles |
18th March, 1915 |
| Roland Garros uses deflector plates |
1st April, 1915 |
| German gas attack at Ypres |
22nd April, 1915 |
| Allied landings at Gallipoli |
25th April, 1915 |
| Sinking of the Lusitania |
7th May, 1915 |
| Artois Offensive |
9th May, 1915 |
| Italy declares war on Austria-Hungary |
23rd May, 1915 |
| Germany abandons Ypres offensive |
25th May, 1915 |
| Asquith forms coalition government |
25th May, 1915 |
| First Zeppelin raid on London |
31st May, 1915 |
| Isonzo Offensive begins |
23rd June, 1915 |
| Suvla Bay Offensive at Gallipoli |
6th August, 1915 |
| Grand Duke Nikolai sacked as Commander-in-Chief |
5th September, 1915 |
| First tank demonstrated to British military leaders |
11th Sept., 1915 |
| Anglo-French Offensive at Artois-Loos |
25th Sept., 1915 |
| Allied troops land at Salonika |
5th October, 1915 |
| Edith Cavell executed |
12th October, 1915 |
| Sir Douglas Haig, new BEF commander |
19th December, 1915 |
| Britain introduces conscription |
2nd February, 1916 |
| German Verdun Offensive |
21st February, 1916 |
| Germany declares war on Portugal |
9th March, 1916 |
| Battle of Jutland |
31st May, 1916 |
| Russian Brusilov Offensive |
4th June, 1916 |
| Lord Kitchener killed at sea |
5th June, 1916 |
| Start of Anglo-French Somme Offensive |
1st July, 1916 |
| Italian Gorizia Offensive |
9th August, 1916 |
| Hindenburg becomes German Chief of Staff |
29th August, 1916 |
| First use of British tanks at Flers-Courcelette |
15th September, 1916 |
| French recapture Douaumont Fort at Verdun |
24th October, 1916 |
| Somme Offensive ends |
18th November, 1916 |
| Beatty replaces Jellicoe as C-in-C of Grand Fleet |
29th November, 1916 |
| Lloyd George becomes British Prime Minister |
6th December, 1916 |
| Nivelle becomes French Western Front C-in-C |
12th December, 1916 |
| Zimmermann Telegram intercepted by Britain |
19th January, 1917 |
| Battle of Gaza begins |
19th January, 1917 |
| United States declares war on Germany |
19th January, 1917 |
| Start of Nivelle Offensive |
19th January, 1917 |
| Start of Arras offensive |
19th January, 1917 |
| Canadian Army captures Vimy Ridge |
12th April, 1917 |
| 2nd Battle of the Aisne begins |
16th April, 1917 |
| French tanks used for the first time in battle |
17th April, 1917 |
| Petain becomes French Western Front C-in-C |
15th May, 1917 |
| Maria Bochkareva forms the Women's Battalion |
16th May, 1917 |
| John Pershing given command of AEF |
19th May, 1917 |
| British attack at Messines |
7th June, 1917 |
| United States troops arrive in France |
25th June, 1917 |
| Greece declares war on the Central Powers |
29th June, 1917 |
| King George V changes name to Windsor |
7th July, 1917 |
| British Offensive at Passchendaele |
12th October, 1917 |
| Italian Caproretto Offensive |
24th October, 1917 |
| Sir Frederick Maude dies in Mesopotamia |
18th November, 1917 |
| Massed tank attack at Cambrai |
20th November, 1917 |
| Bolshevik government disbands Women's Battalion |
21st November, 1917 |
| Wilson announces 14 Points Peace Programme |
8th January, 1918 |
| Start of German Spring Offensive |
21st March, 1918 |
| Foch appointed Allied Co-ordinator in France |
29th March, 1918 |
| 3rd Battle of the Aisne begins |
27th May, 1918 |
| Battle of Le Hamel |
4th July, 1918 |
| 2nd Battle of the Marne |
15th July, 1918 |
| German retreat at the Marne |
20th July, 1918 |
| Amiens Offensive |
8th August, 1918 |
| Allied breakthrough at Albert |
21st August, 1918 |
| United States St Mihiel Offensive |
26th September, 1918 |
| Meuse-Argonne Offensive begins |
26th September, 1918 |
| Canal du Nord Offensive |
27th September, 1918 |
| Max von Baden appointed Chancellor of Germany |
3rd October, 1918 |
| Allied forces capture the Hindenburg Line |
5th October, 1918 |
| Italian Vittorio Veneto Offensive |
23rd October, 1918 |
| Kaiser Wilhelm II of Germany abdicates |
9th November, 1918 |
| Armistice |
11th November, 1918 |
| Lloyd George wins British General Election |
14th December, 1918 |
| Paris Peace Conference |
12th January, 1919 |
| Treaty of Versailles signed |
28th June, 1919 |