World War I By csweis17 Jul 28, 1914 Austria Hungary declares war on Serbia Aug 1, 1914 Germany declares war on Russia Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 19, 1914 U.S. President Woodrow Wilson announces the U.S. will remain neutral. Aug 26, 1914 The Battle of Tannenberg begins Oct 19, 1914 Battle of Ypres begins. Nov 3, 1914 The United Kingdom announces that the North Sea is a military area, effectively creating a blockade of goods into Germany. Feb 4, 1915 Germany declares a "war zone" around Great Britain Apr 22, 1915 The Second Battle of Ypres begins Apr 25, 1915 The Battle of Gallipoli begins. Mar 15, 1917 Russian Tsar Nicholas II abdicates. Apr 6, 1917 The United States declares war on Germany. Jul 31, 1917 The Battle of Passchendaele (also known as the Third Battle of Ypres) begins. Nov 7, 1917 The Bolsheviks successfully overthrow the Russian government Jan 18, 1918 U.S. President Woodrow Wilson issues his Fourteen Points to peace. 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 Germany signs the armistice at Compiegne, France. Jun 28, 1919 The Treaty of Versailles officially ends WWI.