World War 1 Timeline By shornick2015 Jul 28, 1914 World War 1 Started Jul 28, 1914 Austria declared war on Serbia May 31, 1916 Battle of Jutland Nov 11, 1918 World War 1 Ended Jun 14, 1919 World War 2 Started Sep 18, 1931 Japan invades Manchuria. Jul 7, 1937 Japan invades China, initiating World War II in the Pacific. Sep 1, 1939 Germany invades Poland, initiating World War II in Europe Sep 3, 1939 Honoring their guarantee of Poland’s borders, Great Britain and France declare war on Germany Sep 17, 1939 The Soviet union Invades Poland from the east.
