World War 1 By AprilHicks Jul 28, 1914 Austria declares war on Serbia Austria declares war on Serbia Period: Jul 28, 1914 to Nov 11, 1918 World War 1 Aug 1, 1914 Germany declares war on Russia May 23, 1915 Italy changed sides & declared war on Germany & austria Dec 23, 1915 The allies started the evacuation from Gallipoli Jan 27, 1916 conscription introduced in Britain Apr 29, 1916 British forces surrender to Turkish forces at Kut in Mesopetamia Jul 1, 1916 Start of the battle of Somme Apr 6, 1917 USA declared war on Germany gave the edge the allies needed Nov 6, 1917 British launched a major unsucessful assault on the Western Front Dec 5, 1917 Armistice between Germany & Russia signed Mar 22, 1918 Germany broke through Somme Jul 15, 1918 Second battle of marne started this resulted in the start of the down fall of Germany Nov 11, 1918 Germany signed armistice with allies officially ending the war