Time Line for WWI - Tri Nguyen By sadowclone Period: Jan 1, 1914 to Dec 31, 1919 WWI Jun 28, 1914 Archduke Franz Ferdinand assassinated Jul 23, 1914 Austrian Ultimatum to Serbia Jul 28, 1914 Austria-Hungary declares war on Serbia Aug 4, 1914 Great Britain declared war on Germany Aug 26, 1914 Battle of Tannenberg begins Sep 1, 1914 Trench Warfare begins Sep 6, 1914 First Battle of the Marne begins Jan 18, 1915 21 Demands' Made by Japan to China Feb 1, 1915 Battle for Gallipoli Apr 26, 1915 Italy joins the allies May 7, 1915 Sinking of the Lusitania May 7, 1915 Feb 21, 1916 Battle of Verdun Begins May 31, 1916 The Battle of Jutland Jul 1, 1916 Battle of the Somme Battle of the Somme Jan 31, 1917 Germans unleash U-Boats Feb 1, 1917 Germany resumes unrestricted submarine warfare Mar 1, 1917 Zimmermann Telegram published in United States Apr 6, 1917 America enters the war April 6, 1917 Jul 1, 1917 Russian Communist Revolution begins Mar 21, 1918 Hindenburg Offensive Begins May 3, 1918 Treaty of Brest-Litovsk concluded Sep 26, 1918 Meuse-Argonne offensive opens Nov 1, 1918 The armistice is signed Nov 28, 1918 Kaiser Wilhelm II's Abdication Proclamation Jun 28, 1919 Treaty of Versailles ended the war
