WHAT ALL HAPPENED MARCH TO MAY 1940
Find out what all happened March to May 1940

Igor Sikorsky performs the first successful single-rotor helicopter flight. (24. May 1940)

World War II: Rotterdam is bombed by the German Luftwaffe. (14. May 1940)

World War II: The Battle of the Netherlands ends with the Netherlands surrendering to Germany. (14. May 1940)

The Russo-Finnish Winter War ends. (13. March 1940)

World War II: The German 2nd Panzer Division captures the port of Boulogne-sur-Mer; the surrender of the last French and British troops marks the end of the Battle of Boulogne (25. May 1940)

World War II: Germany invades Belgium, the Netherlands and Luxembourg. (10. May 1940)

World War II: The Siege of Calais ends with the surrender of the British and French garrison. (26. May 1940)

World War II: Royal Marines land in Namsos, Norway in preparation for a larger force to arrive two days later. (14. April 1940)

World War II: Norwegian refugees form a government-in-exile in London (5. May 1940)

World War II: Norwegian Campaign – Norwegian squads in Hegra Fortress and Vinjesvingen capitulate to German forces after all other Norwegian forces in southern Norway had laid down their arms. (5. May 1940)

World War II: German fighters accidentally bomb the German city of Freiburg. (10. May 1940)

The Yermolayev Yer-2, a long-range Soviet medium bomber, has its first flight. (14. May 1940)

World War II: Axis Powers – Adolf Hitler and Benito Mussolini meet at the Brenner Pass in the Alps and agree to form an alliance against France and the United Kingdom. (18. March 1940)

World War II: Norwegian, French, Polish and British forces recapture Narvik in Norway. This is the first allied infantry victory of the War. (28. May 1940)

Booker T. Washington becomes the first African American to be depicted on a United States postage stamp. (7. April 1940)

Vidkun Quisling seizes power in Norway. (9. April 1940)

World War II: The German submarine U-9 sinks the French coastal submarine Doris near Den Helder. (9. May 1940)

The first flight of the Vought F4U Corsair. (29. May 1940)

World War II: Belgium surrenders to Nazi Germany to end the Battle of Belgium. (28. May 1940)

John Steinbeck is awarded the Pulitzer Prize for his novel The Grapes of Wrath. (6. May 1940)