D-Day (1944): During World War II, the Allied powers planned to create a two-front war by continuing the Soviet Union's attack of Nazi-occupied lands from the east and by beginning a new invasion from the west.
In June 1944, the United States and the United Kingdom (with help from many other western countries) began the long-awaited attack from the west, the Normandy Invasion (Operation Overlord). June 6, 1944, also known as D-Day, was the very first day of this massive amphibious invasion, which brought thousands of ships, tanks, planes, and troops across the English Channel.
