World War I By hunterfleming Jun 28, 1914 Assasination of Archduke Ferdinand Jul 28, 1914 Austria-Hungary declares war on Serbia and Russia. Aug 1, 1914 Germany declares war on Russia. Period: Aug 1, 1914 to Jun 28, 1919 World War I Aug 3, 1914 Germany declares war on France. Aug 4, 1914 Germany declares war on neutral Belgium Aug 4, 1914 Britain declares war on Germany and Austria-Hungary Aug 4, 1914 Canada joins the war Oct 29, 1914 Turkey enters the war on the side of the Central Powers. Feb 4, 1915 Germany declares a submarine blockade of Great Britain. Any ship approaching England is considered a legitimate target. Nov 4, 1915 Henry Ford's peace ship, Oskar II, begins its voyage to Europe. Apr 19, 1916 President Wilson, publicly calls for the German's to stop their submarine policy of sinking all ships in enemy waters without warning. May 4, 1916 Germany renounces submarine policy. Sep 15, 1916 Tanks introduced for the first time on the Somme battlefield by the British. Oct 15, 1916 Germany resumes U-boat attacks under search and destroy rules. Nov 7, 1916 Woodrow Wilson is re-elected in the USA with a campaign slogan of "He kept us out of the war". Feb 1, 1917 Germany resumes unrestricted U-boat warfare. Feb 24, 1917 The Zimmermann Telegram is passed to the US by Britain, detailing alleged German proposal of an alliance with Mexico against the US. Mar 20, 1917 US President Woodrow Wilson's war cabinet votes unanimously in favour of declaring war on Germany. Apr 6, 1917 United States comes out of neutrality and declares war on Germany, thus entering the First World War. Jun 27, 1917 Greece enters the war on the side of the Allies. Dec 7, 1917 The United States declares war on Austro-Hungary. Jan 8, 1918 President Woodrow Wilson delivers his fourteen points speech to the U.S. Congress. Oct 3, 1918 Germany and Austria send peace notes to US President Woodrow Wilson requesting an armistice. Nov 5, 1918 Allies accept the fourteen points. Nov 7, 1918 Germany begins negotiations for an armistice with the Allies in Ferdinand Foch's railway carriage headquarters at Compiegne. Nov 11, 1918 Armistice day as fighting ceases at 11am - World War I ends. Central Powers are forced to annul the Brest-Litovsk Treaty. Jun 28, 1919 The Treaty of Versailles is signed in Hall of Mirrors at Versailles, officially ending the Great War.