D-Day was the name given to the June 6, 1944, invasion of the beaches at Normandy in northern France by troops from the United States, Canada, the United Kingdom and other countries during World War II. France at the time was occupied by the armies of Nazi Germany, and the amphibious assault—codenamed Operation Overlord—landed some 156,000 Allied soldiers on the beaches of Normandy by the end of the day.
Despite their success, some 4,000 Allied troops were killed by German soldiers defending the beaches. At the time, the D-Day invasion was the largest naval, air and land operation in history, and within a few days about 326,000 troops, more than 50,000 vehicles and some 100,000 tons of equipment had landed. By August 1944, all of northern France had been liberated, and in spring of 1945 the Allies had defeated the Germans. Historians often refer to D-Day as the beginning of the end of World War II.
After World War II began, Germany invaded and occupied northwestern France beginning in May 1940. The Americans entered the war in December 1941, and by 1942 they and the British (who had been evacuated from the beaches of Dunkirk in May 1940 after being cut off by the Germans in the Battle of France) were considering the possibility of a major Allied invasion across the English Channel.
The following year, Allied plans for a cross-Channel invasion began to ramp up. In November 1943, Adolf Hitler (1889-1945), who was aware of the threat of an invasion along France’s northern coast, put Erwin Rommel (1891-1944) in charge of spearheading defense operations in the region, even though the Germans did not know exactly where the Allies would strike. Hitler charged Rommel with finishing the Atlantic Wall, a 2,400-mile fortification of bunkers, landmines and beach and water obstacles.
In January 1944, General Dwight Eisenhower (1890-1969) was appointed commander of Operation Overlord. In the months and weeks before D-Day, the Allies carried out a massive deception operation intended to make the Germans think the main invasion target was Pas-de-Calais (the narrowest point between Britain and France) rather than Normandy. In addition, they led the Germans to believe that Norway and other locations were also potential invasion targets. Many tactics were used to carry out the deception, including fake equipment; a phantom army commanded by George Patton and supposedly based in England, across from Pas-de-Calais; double agents; and fraudulent radio transmissions.
