March: Truth or Consequences debuts on NBC Radio.

March 2: Cartoon character Elmer Fudd makes his debut in the animated short Elmer's Candid Camera.

March 3: In Sweden, a time bomb destroys the office of Norrskenflamman (a Swedish communist newspaper), killing 5.

March 5: Members of the Soviet Politburo (Joseph Stalin, Vyacheslav Molotov, Lazar Kaganovich, Mikhail Kalinin, Kliment Voroshilov and Lavrenty Beria) sign an order, prepared by Beria, for the execution of 25,700 Polish intelligentsia, including 14,700 Polish POWs.

March 11: Ed Ricketts, John Steinbeck and six others leave Monterey, California for The Sea of Cortez on a collecting expedition.

March 12: The Soviet Union and Finland sign a peace treaty in Moscow ending the Winter War; Finns, along with the world at large, are shocked by the harsh terms.

March 18: Adolf Hitler and Benito Mussolini meet at Brenner Pass in the Alps and agree to form an alliance against France and the United Kingdom.

March 21: Edouard Daladier resigns as prime minister of France; Paul Reynaud succeeds him.

March 23: The Lahore Resolution, calling for greater autonomy for what will become Pakistan in British India, is drawn up by the All-India Muslim League during a three-day general session at Iqbal Park, Lahore.

March 31: Commerce raiding German auxiliary cruiser Atlantis, leaves the Wadden Sea for what will become the longest warship cruise of the war. (622 days without in-port replenishment or repair) (source: Wikipedia)