More than they were by homework sets. Academic research certainly played a role in winning the second world war. I'd say that quality leadership played an even bigger role. Cadets and Midshipmen at our service academies have always been required to participate in athletics because team sports develop leadership, teamwork, and tactical and strategic thinking (in the '30s through the '60s, the service academies were powerhouses in college football). Academy graduates were a minority of overall officers in the war, but were a majority of the most senior officers. Prior to the war, the cadre of war college students and faculty who developed the tactics and strategies which won the war were also predominantly academy graduates.