WWI TIME LINE By KylaOconnell 1914 Austria-Hungary declares war on Serbia Period: 1914 to 1919 WWI Jun 28, 1914 Archduke Franz Ferdinand is assassinated. Aug 3, 1914 Germany declares war on France as part of the Schlieffen Plan. Nov 2, 1914 the British begin a naval blockade of Germany. May 7, 1915 Lusitania sinks Oct 14, 1915 Bulgaria enters the war by declaring war on Serbia. Jul 1, 1916 The Battle of the Somme begins. Apr 6, 1917 U.S officially declared war on Germany Dec 17, 1917 The Russians peace with the central powers and leave the war Jan 8, 1918 President Woodrow Wilson issues his "Fourteen Points" for peace and an end to the war. Nov 11, 1918 Fighting of WWI comes to an end Jun 28, 1919 Treaty of Versailles is signed