WWII By JHo99a Sep 1, 1939 Germany invades Poland Period: Sep 1, 1939 to Jun 1, 1945 WW2 (1939~1945) Sep 3, 1939 Great Britain and France declare war on Germany Apr 9, 1940 Germany invades Denmark & Norway Jun 10, 1940 Italy declares war on Great Britan and France Jun 22, 1940 France signs armistice with Germany Period: Jul 1, 1940 to Oct 10, 1940 Battle of Britain Apr 6, 1941 Germany invades Greece and Yugoslavia Dec 8, 1941 U.S. declares war on Japan after attack on Pearl Harbor Dec 11, 1941 Germany and Italy declare war on U.S. Sep 3, 1943 Italians secretly surrender Jun 15, 1944 Soviets push Germans into Poland Aug 25, 1944 Paris liberated Apr 16, 1945 Soviets launch attack on Berlin Apr 30, 1945 Hitler commits suicide May 7, 1945 Germany surrenders WWII in Europe ends.