World War I Timeline By Bradenmc2 Jun 28, 1914 Archduke Francis Ferdinand gets assassinated Jul 28, 1914 Austria-Hungary declares war on Serbia Aug 10, 1914 Austria-Hungary invades Russia Sep 9, 1914 Allied forces halt German advance into France Feb 18, 1915 Germany starts naval blockade of Great Britain May 7, 1915 The Sinking of Lusitania May 23, 1915 Italy declares war on Austria-Hungary Feb 21, 1916 Germany starts the attack on Verdun May 31, 1916 Naval Battle of Jutland takes place Jul 1, 1916 Battle of the Somme begins Dec 18, 1916 Battle of Verdun ends Apr 6, 1917 The US declares war on Germany Dec 15, 1917 Russia signs armistice with Germany Mar 3, 1918 Russia signs a treaty with Germany Mar 21, 1918 Germany begins its final offensive of the war Sep 26, 1918 Allied forces start attack at Meusse-Argonne Nov 11, 1918 Germany signs the Armistice at Compiègne Nov 11, 1918 World War I Ends