Chelsee Warren's WW1 By porkiepine Jan 1, 1867 Austria-Hungary takes over croatia Aug 15, 1906 advancement of warship construction Aug 15, 1907 russin becameallied with england Aug 15, 1908 austria-hungery takes over bosnia/serbia Aug 15, 1911 lewis gun Aug 15, 1914 Gravillo Princip kills franz ferdinanl this assinasion starts the war Aug 15, 1914 Chlorine used Aug 15, 1915 Battle of ypres Aug 15, 1915 Tanks 1st used Aug 15, 1915 Turkey enters war Aug 15, 1915 Italy enters on allies side Aug 15, 1915 Motor machine guns used Aug 15, 1915 Gallipoli Aug 15, 1916 Battle of verdum Aug 15, 1916 battle of the somme Aug 15, 1916 Hill 60 Aug 15, 1917 Submarines used Aug 15, 1917 America enters war Aug 15, 1917 Battle of le hammel Aug 15, 1917 Battle of cambrai Aug 15, 1918 battle of amiens Oct 15, 1918 German navy mutinied Nov 15, 1918 austria surrendered & Germany surrendered Aug 15, 1919 treaty of vesilles