Soviets attack Finland Dec. 14. Soviets Union expelled from the League of Nations 1940 Mar. 12. Finland signs a peace treaty with Soviets Mar. 16. Germans bomb Scapa Flow naval base near Scotland Apr. 09. Nazis invade Denmark and Norway May 10.
Nazis invade France, Belgium, Luxembourg and the Netherlands.
Winston Churchill becomes British Prime May 15. Evacuation of Allied troops from Dunkirk begins May 28. Belgium surrenders to the Nazis Jun. 03. Germans bomb Paris. Dunkirk evacuation ends Jun. 10.