World War One By LegionOfMeh Jun 28, 1914 Archduke Franz Ferdinand is assassinated Aug 4, 1914 Germany Invades Belgium Period: Aug 4, 1914 to Nov 11, 1918 World War One Sep 15, 1915 Battle of Delville Wood, first tanks Period: Feb 21, 1916 to Dec 18, 1916 Battle of Verdun Period: Jul 1, 1916 to Nov 18, 1916 Battle of the Somme Apr 6, 1917 United States enters the war Nov 9, 1918 Kaiser Wilhem surrenders Nov 11, 1918 The War Ends