May 8 - World War II: The Battle of the Coral Sea comes to an end. This is the first time in the naval history where two enemy fleets fought without seeing each other's fleets.
May 12 - World War II: Battle of Kharkov - In the eastern Ukraine, the Soviet Army initiates its first major offensive of the war. During the battle the Soviets will take the city of Kharkov back from the German Army.
November 21 - The completion of the Alaska Highway (also known as the Alcan Highway) is celebrated (the "highway" was not usable by general vehicles until 1943, however).
December 4 - Holocaust: In Warsaw, two Christian women, Zofia Kossak and Wanda Filipowicz risk their lives by setting up the Council for the Assistance of the Jews.