Operation Overlord, (also known as D-Day), began on June 6, 1944, when some 156,000 American, British and Canadian forces landed on five beaches along a 50-mile stretch of the heavily fortified coast of France’s Normandy region. The invasion was one of the largest amphibious military assaults in history and required extensive planning.
D-Day During World War II the allied forces planned to create a two front-war by continuing the battle on the east. Also to start a new battle on the western front. In June 1944 the United States, United Kingdom, and a few other countries started the attack. Operation Overload also known as D-Day.