WWI By MissBanning Jun 28, 1914 Assassination of Archduke Ferdinand Jul 28, 1914 Austria-Hungary declares war on Serbia Sep 5, 1914 First Battle of the Marne to September 10th Dec 25, 1914 Christmas Truce May 7, 1915 Sinking of Lusitania Jul 1, 1916 Battle of the Somme Starts Nov 18, 1916 Battle of the Somme ends Jul 11, 1992 My Birthday day I was born