world war 1 By clemmer15 Jun 28, 1914 francis ferdinand is assissinated Archduke Francis Ferdinand heir to the Austria-Hungary throne and his wife are assassinated by a Serbian Nationalist in Sarejevo Jul 28, 1914 Emperor Franz Joseph of Austria-Hungary declares war on Serbia Jul 29, 1914 russia begins to mobilize forces and Austria-hungary invades serbia Aug 1, 1914 germany declares war on russia, start of world war 1 Aug 3, 1914 germany declares war on france Aug 4, 1914 Germany declares war on neutral Belgium, britian declares war on germany and the U.S. states neutrality Aug 14, 1914 The Battle of the Frontiers begins Sep 5, 1914 First Battle of the Marne begins Sep 9, 1914 First Battle of the Masurian Lakes begins Sep 10, 1914 First Battle of the Marne ends in a French Victory Sep 14, 1914 Russia loses the First Battle of Masurian Lakes Oct 29, 1914 Turkey enters the war on the side of the Central Powers Dec 8, 1914 Battle of the Falkland Islands between British and German Naval units. Dec 25, 1914 An unofficial Christmas truce is declared by soldiers along the Western Front Feb 4, 1915 Germany declares a submarine blockade of Great Britain Mar 1, 1915 American citizen die as the British liner Falaba, becomes the first passenger ship to be sunk by U-boats. Mar 3, 1915 Britain announces a blockade of all German ports May 7, 1915 The British liner Lusitania is sunk by a U-Boat with the loss of 1,198 civilians, including 128 American lives, creating a diplomatic crisis May 23, 1915 Italy declares war on Austria-Hungary Oct 21, 1915 The Washington Post carries story that General Staff are planning to send a force of 1 million soldiers overseas Oct 31, 1915 The Germans end their offensive against the Russians Apr 5, 1916 Germany renounces submarine policy May 31, 1916 Battle of Jutland begins between British and German naval forces Jun 1, 1916 Having been the biggest naval battle in history, the battle of Jutland ends without a clear victor Aug 1, 1916 Romania enters the war on the Allies side Nov 15, 1916 Tanks introduced for the first time on the Somme battlefield by the British Jan 9, 1917 German leaders decide to launch unrestricted U-boat warfare Jan 22, 1917 "Peace without Victory." speech is made by President Wilson Mar 1, 1917 Zimmermann Telegram is released to press by US State Department. The Armed Ship Bill is passed by Congress. Apr 6, 1917 United States comes out of neutrality and declares war on Germany Jun 26, 1917 The first U.S. troops begin arriving in France. These are men of the U.S. 1st Division Jun 27, 1917 7 Greece enters the war on the side of the Allies Dec 7, 1917 The United States declares war on Austro-Hungary May 28, 1918 U.S. forces (28th Regiment of 1st Division) are victorious in their first major action, Battle of Cantigny Nov 11, 1918 Armistice day as fighting ceases at 11am - World War I ends