World War I Timeline By jhhuang7 Jun 28, 1914 Archduke Franz Ferdinand (heir to Hungarian throne) and his wife was assassinated. Period: Jul 23, 1914 to Jul 23, 1918 WW1 Aug 4, 1914 Germany declares war on Russia and France. Germany declares war on Russia and France. May 23, 1915 A German U-boat sinks the Lustania, killing 1198 people. Oct 23, 1916 The first conscription in Australia is narrowly defeated. Jul 23, 1917 America contributes the decision to enter the war.
