AP Euro 1914-Present By TBearE1234 May 28, 1914 Assassination of Archduke Franz Ferdinand Jul 5, 1914 "Blank Check" Jul 23, 1914 Serbian Ultimatum Jul 28, 1914 Austria declares war on Serbia Jul 28, 1914 Tsar Nicholas II orders partial mobilization of army Jul 29, 1914 Full mobilization of the Russian army Aug 1, 1914 Germany declares war on Russia Aug 2, 1914 Germany issues ultimatum to Belgium Aug 3, 1914 Germany declares war for France Aug 4, 1914 Great Britain declares war on Germany Period: Sep 6, 1914 to Sep 10, 1914 First Battle of the Marne The French are able to turn the Germans away for Paris and trench warfare begins on the western front. 1915 Italy joins the Allies