ww1 By Rj catahay cruz Aug 1, 1914 Germany declares war on Russia Period: Aug 1, 1914 to 1919 Germany's involvement in ww1 Aug 3, 1914 Germany declares war on France Aug 4, 1914 German troops enter Belgium Aug 4, 1914 Great Britain declares war on Germany Aug 14, 1914 French troops enter Lorraine Aug 26, 1914 Battle of Tannenberg begins Sep 6, 1914 Battle of the Marne begins Sep 13, 1914 French troops attack German Army at the River Aisne Sep 25, 1914 Battle of Albert Oct 1, 1914 Battle of Arras Oct 5, 1914 First German aircraft shot down by Allied plane Oct 15, 1914 Battle of Ypres Oct 29, 1914 Turkey joins Central Powers Jan 24, 1915 Battle of Dogger Bank Apr 22, 1915 German gas attack at Ypres May 7, 1915 Sinking of the Lusitania May 23, 1915 Italy declares war on Austria-Hungary Mar 9, 1916 Germany declares war on Portugal May 31, 1916 Battle of Jutland Nov 16, 1916 death of Elais Schurmann died of blood loss Nov 18, 1916 Somme Offensive ends Jan 19, 1917 Battle of Gaza begins Jan 19, 1917 United States declares war on Germany