WW1 By Jemma2332 Jul 28, 1914 Austria declares war on Serbia Period: Jul 28, 1914 to Nov 11, 1918 WW1 beginning-end Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Germany invades Belgium and has to implement the Schlieffen plan Aug 4, 1914 Britain declares war on Germany Aug 23, 1914 The BEF began its retreat from Mons Germany invaded france Aug 26, 1914 Russian army defeated at Tannenburg and Masurian Lakes Sep 6, 1914 Battle of the Marne started Oct 29, 1914 Turkey entered the war on Germany's side Trench Warfare starts to dominate the Western front