June 1944 was a major turning point of World War II, particularly in Europe. Although the initiative had been seized from the Germans some months before, so far the western Allies had been unable to mass sufficient men and material to risk an attack in northern Europe.
By mid-1944 early mobilization of manpower and resources in America was beginning to pay off. Millions of American men had been trained, equipped, and welded into fighting and service units. American industrial production had reached its wartime peak late in 1943. While there were still critical shortages -- in landing craf…