world war 1 By stefank0451 Jun 28, 1914 Francis Ferdinand assassinated at Sarajevo Period: Jun 28, 1914 to Nov 11, 1918 world war 1 Jul 5, 1914 Kaiser William II promised German support for Austria against Serbia Jul 28, 1914 Austria declared war on Serbia Aug 1, 1914 Germany declared war on Russia Aug 3, 1914 Germany declared war on France and invaded Belgium. Germany had to implement the Schlieffen Plan. Aug 4, 1914 Britain declared war on Germany Aug 23, 1914 The BEF started its retreat from Mons. Germany invaded France. Aug 26, 1914 August 26th Russian army defeated at Tannenburg and MasurianLakes. Sep 6, 1914 Battle of the Marne started Oct 18, 1914 First Battle of Ypres Oct 29, 1914 Turkey entered the war on Germany’s side. Trench warfare started to dominate the Western Front. Jan 19, 1915 The first Zeppelin raid on Britain took place Feb 19, 1915 Britain bombarded Turkish forts in the Dardanelles Apr 25, 1915 April 25th Allied troops landed in Gallipoli May 7, 1915 The “Lusitania” was sunk by a German U-boat May 23, 1915 Italy declared war on Germany and Austria Aug 5, 1915 The Germans captured Warsaw from the Russians Sep 25, 1915 September 25th Start of the Battle of Loos Dec 19, 1915 The Allies started the evacuation of Gallipoli Jan 27, 1916 Conscription introduced in Britain