Six days after the D-Day landing, the five Allied landing groups, made up of some 330,000 troops, link up in Normandy to form a single solid front across northwestern France.
On June 6, 1944, after a year of meticulous planning conducted in secrecy by a joint Anglo-American staff, the largest combined sea, air, and land military operation in history began on the French coast at Normandy. The Allied invasion force included 3 million men, 13,000 aircraft, 1,200 warships, 2,700 merchant ships, and 2,500 landing craft.