Events in WW1 History By tosborne Period: Jul 28, 1914 to 1914 July Crisis Period: Jul 28, 1914 to Nov 11, 1918 End of WW1 Period: Aug 4, 1914 to 1914 Australia enters WW1 Period: Apr 25, 1915 to 1916 Gallipoli campaign begins Period: Aug 6, 1915 to Aug 27, 1915 Gallipoli offensives Period: 1916 to 1917 Conscription referenda Period: Apr 7, 1916 to Nov 18, 1916 Battle of the Somme