23 Jul 1914Austro-Hungarianultimatum to Serbia
24 Jul 1914Serbia appealsto Russia
28 Jul 1914Austria-Hungarydeclares war on Serbia
28 Jul 1914Russia mobilizes
1 Aug 1914Germany declareswar on Russia
1 Aug 1914France mobilizes
4 Aug 1914Britain declareswar on Germany
4 Aug 1914Germany launchesinvasion of Francethrough Belgium