World War 1 By reidjack Jun 28, 1914 World War 1 started Francis Ferdinand assassinated at Sarajevo Jun 28, 1914 Francis Ferdinand assassinated at Sarajevo Oct 8, 1914 The first Australian Imperial Force Apr 25, 1915 Anzacs landed at Gallipoli Aug 8, 1915 Attack on the Nek and Lone Pine Nov 8, 1915 PM Hughes announced an increase in Australian force Jul 1, 1916 Australian troops took part in Battle of Somme Oct 22, 1916 First conscription referendum Apr 6, 1917 USA declared war on Germany Nov 11, 1918 World War 1 ended Germany signed an armistice with the Allies – the official date of the end of World War One. Jun 6, 1919 The traety of Versailles