On June 4, 1944, American forces took possession of Rome under the command of Lt. General Mark Clark. In taking the undefended Italian capital, Clark's decision allowed the German Tenth Army to escape and inflict substantial casualties on Allied forces in the coming months. The capture of Rome was soon replaced in the headlines with the Allied landings on D-Day at Normandy on June 6th.
How might the course of the war in Europe had been different if Clark had elected a different course of action?