World War I By C_Jones72 Jul 28, 1914 Austrria-Hungary declares war on Serbia On June 28, 1914, a Serbian nationalist named Gavrilo Princip assassinated Franz Ferdinand one mpnth later austria declared war on serbia Period: Jul 28, 1914 to Nov 11, 1918 ww1 Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 4, 1914 The UK declares war on Germany Aug 6, 1914 Austria-Hungary declares war on Russia and Serbia declares war on germany Aug 26, 1914 the battle of Tannenberg begins Sep 5, 1914 The First Battle of the Marne begins Sep 19, 1914 the battle of Ypres begins Feb 19, 1915 The Dardanelles Campaign begins Apr 22, 1915 The Second Battle of Ypres begins Apr 25, 1915 The Battle of Gallipoli begins 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 Nov 7, 1917 The Bolsheviks successfully overthrow the Russian government during the 1917 Russian Revolution. Mar 21, 1918 Germany launches the Spring Offensive. Jul 15, 1918 The Second Battle of the Marne begins. Nov 11, 1918 The Treaty of Versailles officially ends WWI