World War I By Nyshiana R. Jun 28, 1914 Assassination Archduke Ferdinand Assassination of Ferdinand Jul 28, 1914 Austria-Hungary declares war on Serbia Austria-Hungary declares war Period: Sep 6, 1914 to Sep 12, 1914 First Battle of Marne Battle of Marne May 7, 1915 Lusitania Sinks Lusitania Sinks May 23, 1915 Italy declares war on Austria-Hungary Italy declares war Period: Feb 21, 1916 to Dec 18, 1916 Battle of Verdun Verdun Battle Period: May 31, 1916 to Jun 1, 1916 Battle of Jutland Jutland Battle Period: Jul 1, 1916 to Nov 18, 1916 Battle of the Somme Somme Battle Jan 16, 1917 Zimmerman Telegram Zimmerman Telegram Apr 6, 1917 The United States declares war on Germany. The US declares war Period: Aug 8, 1918 to Aug 11, 1918 Battle of Amiens Amiens Battle Nov 9, 1918 Wilhelm Abdicates Wilhelm Abdicates Nov 11, 1918 Armistice Day Armistice Day Jun 28, 1919 Signing of the Treaty of Versailles Signing of Versailles
