Mar. 11. The Lend-Lease program enabled the UK, Soviet Union, France, and other Allied nations to receive war material from the United States.
Apr. 6. Yugoslavia is invaded by Bulgaria, Germany, Hungary, and Italy.
Apr. 10. The US build air and naval bases after occupying Greenland. This action was with the consent of the “free Denmark” group. The purpose was to counter the U-boat war going on.