World War 1 By Enuri Jun 28, 1914 Assassination of Archduke Ferdinand Jul 23, 1914 Austra-Hungary demands Serbia arrest the leaders of the Black Hand Jul 28, 1914 Serbia appeals to Russia for help Jul 28, 1914 Austria-Hungary declares war on Serbia Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 4, 1914 Moltke orders the Schlieffen Plan to proceed Aug 4, 1914 German troops enter Belgium Aug 4, 1914 Great Britain declares war on Germany Aug 7, 1914 Lord Kitchener calls for 100,000 men to join British Army Aug 12, 1914 Big Bertha used against Liege Forts Aug 12, 1914 Austro-Hungarian troops invade Serbia Aug 14, 1914 French troops enter Lorraine Aug 22, 1914 British Expeditionary Force arrives in France Aug 23, 1914 Battle of Mons begins Aug 24, 1914 French Army abandons Plan 17 Aug 26, 1914 Battle of Tannenberg begins Aug 28, 1914 Battle of Heligoland Sep 2, 1914 War Propaganda Bureau Writers Conference Sep 6, 1914 Battle of the Marne begins Sep 13, 1914 French troops attack German Army at the River Aisne Sep 25, 1914 Battle of Albert Oct 1, 1914 Battle of Arras Oct 5, 1914 First German aircraft shot down by Allied plane Oct 15, 1914 Battle of Ypres Oct 16, 1914 Canadian troops arrive in Britain Oct 29, 1914 Turkey joins Central Pwers Nov 21, 1914 Anglo-Indian invasion of Mesopotamia Dec 21, 1914 Farman MF-11 carries out first night bombing raid Dec 25, 1914 Christmas Truce on the Western Front Jan 14, 1915 South African forces occupy Swakopmund Jan 24, 1915 Battle of Dogger Bank Mar 10, 1915 BEF attacks at Neuve Chapelle Mar 18, 1915 Allied naval attack on the Dardanelles Apr 1, 1915 Roland Garros uses deflector plates Apr 22, 1915 German gas attack at Ypres Apr 25, 1915 Allied landings at Gallipoli May 7, 1915 Sinking of the Lusitania May 23, 1915 Artois Offensive May 25, 1915 Italy declares war on Austria-Hungary May 25, 1915 Germany abandons Ypres offensive May 25, 1915 Asquith forms coalition government May 31, 1915 First Zeppelin raid on London Jun 23, 1915 Isonzo Offensive begins Aug 6, 1915 Suvla Bay Offensive at Gallipoli Sep 5, 1915 Grand Duke Nikolai sacked as Commander-in-Chief Sep 11, 1915 First tank demonstrated to British military leaders Sep 25, 1915 Anglo-French Offensive at Artois-Loos Oct 5, 1915 Allied troops land at Salonika Oct 12, 1915 Edith Cavell executed Dec 19, 1915 Sir Douglas Haig, new BEF commander Feb 2, 1916 Britain introduces conscription Feb 21, 1916 German Verdun Offensive Mar 9, 1916 Germany declares war on Portugal May 31, 1916 Battle of Jutland Jun 4, 1916 Russian Brusilov Offensive Jun 5, 1916 Lord Kitchener killed at sea Jul 1, 1916 Start of Anglo-French Somme Offensive Aug 9, 1916 Italian Gorizia Offensive Aug 29, 1916 Hindenburg becomes German Chief of Staff Sep 15, 1916 First use of British tanks at Flers-Courcelette Oct 24, 1916 French recapture Douaumont Fort at Verdun Nov 18, 1916 Somme Offensive ends Jan 19, 1917 Start of Nivelle Offensive Apr 17, 1917 French tanks used for the first time in battle Jun 7, 1917 British attack at Messines Oct 24, 1917 Italian Caproretto Offensive Jan 8, 1918 Wilson announces 14 Points Peace Programme May 27, 1918 3rd Battle of the Aisne begins Aug 21, 1918 Allied breakthrough at Albert Oct 5, 1918 Allied forces capture the Hindenburg Line Nov 11, 1918 Armistice Jan 12, 1919 Paris Peace Conference