War World I By A75145615 Jul 28, 1914 War Begins: Austria Hungary declares war on Serbia Austria Hungary declares war on Serbia Period: Jul 28, 1914 to Nov 11, 1918 World War 1 Aug 1, 1914 Germany Declares War On Russia Aug 3, 1914 Germany Declares War On France Aug 4, 1914 United Kingdom Declares War on Germany Aug 4, 1914 Germany Invades Belgium Aug 6, 1914 Austria-Hungary Declares War on Russia Aug 6, 1914 Serbia Declares War on Germany Aug 26, 1914 The Battle of Tannenberg Begins Sep 5, 1914 The First Battle of the Marne Begins Oct 19, 1914 Battle of Ypres begins Nov 3, 1914 United Kingdom Declares North Sea Military Area Feb 4, 1915 Germany Declares "War Zone" Around Great Britain Apr 22, 1915 Second Battle Of Ypres Begins Apr 25, 1915 The Battle of Gallipoli Begins Apr 26, 1915 Germany Starts Using Poison Gas Sep 5, 1915 Tsar Nicholas II takes personal control over Russia's armies. Feb 21, 1916 The Battle of Verdun Begins May 31, 1916 The Battle of Jutland Begins Jul 1, 1916 The Battle of the Somme Begins Jul 5, 1916 Tanks Are Introduced to Battle Jan 19, 1917 Germans Send Telegram to Mexico. British Intercept. Mar 15, 1917 Russian Tsar Nicholas II Abdicates Apr 6, 1917 United States Declares War on Germany Jul 31, 1917 The Battle of Passchendaele Begins Nov 7, 1917 The Bolsheviks Overthrow the Russian Government Jan 8, 1918 President Woodrow Wilson issues his Fourteen Points to peace Mar 3, 1918 Russia signs the Treaty of Brest Litovsk Mar 21, 1918 Germany launches the Spring Offensive Jul 15, 1918 The Second Battle of the Marne Begins Nov 9, 1918 German Kaiser Wilhelm II Abdicates and Flees Germany Nov 11, 1918 War Ends