- January 2nd - Japanese capture Manila.
- January 11th - British re-take Sollum.
- January 11th - Japanese take Kuala Lumpur.
- February 15th - Singapore falls to Japanese.
- March 8th - Japanese enter Rangoon.
- May 6th - British capture Madagascar.
- May 6th - Surrender of all US forces on Phillipines.
- May 28th - Germans defeat Soviets at Kharkov.
- June 4th - Battle of Midway - 4 Japanese carriers sunk.
- July 3rd - Sevastopol falls to Germans.
- August 22nd - Brazil declares war on Germany and Italy.
- October 23rd - Battle of El Alamein begins.
- November 8th - Operation Torch begins - Allies invade NW Africa.