During the armistice proceedings and at the Peace Conference after World War I, French General Maxime Weygand served as chief aid to Marshal Foch. Called out of retirement in the late 1930s, Weygand again served his country during World War II, becoming commander in chief of the French Army. His call for enhanced French unity, military preparedness, and adaptation to a new kind of war dominated by tank mobility might have saved France the humiliating...