WWI By hayeshare Jun 28, 1914 Asssassination of Ferdinand Period: Jun 28, 1914 to Jun 28, 1919 WWI Jul 28, 1914 Austria-Hungary declares war on Serbia Aug 3, 1914 Germany declares war on France Feb 4, 1915 Germany declares a war zone around Great Britain Feb 15, 1915 Dardenelles campaign begins Sep 5, 1915 Tsar Nicholas II takes personal control over Russia's armies. Feb 21, 1916 Battle of Verdund begins May 31, 1916 The Battle of Jutland, the major naval battle of the war, begins The Battle of Jutland, the major naval battle of the war, begins Jul 1, 1916 The Battle of the Somme begins. During the Battle of the Somme, tanks are first introduced into battle. Mar 15, 1917 Russian Tsar Nicholas II abdicates. Apr 6, 1917 The United States declares war on Germany. Nov 7, 1917 The Bolsheviks successfully overthrow the Russian government Jan 8, 1918 U.S. President Woodrow Wilson issues his Fourteen Points to peace. Mar 3, 1918 Russia signs the Treaty of Brest Litovsk, which is a peace treaty between Russia and the Central Powers. Nov 9, 1918 German Kaiser Wilhelm II abdicates and flees Germany Jun 28, 1919 The Treaty of Versailles officially ends WWI.