World War I By MissWoodward Jun 28, 1914 Assassination of Archduke Ferdinand Jul 23, 1914 Austria-Hungry Issues Ultimatum to Serbia Jul 25, 1914 Serbia agrees to only 9/10 demands Jul 28, 1914 Austra-Hungry declares war on Serbia Aug 4, 1914 Britian declares war on Germany Apr 25, 1915 Galilipoli Landing Period: Apr 25, 1915 to Dec 20, 1915 Gallipoli Campaign Nov 11, 1918 Armistice
