This study of Medieval military leadership offers a critical comparison of two great rivals of the Hundred Year War. Known to history as The Black Prince, Edward of Woodstock led the English army to victory at the Battle of Poitiers against the French King Jean II. With an illuminating analysis of these fourteenth century commanders, historian Peter Hoskins examines the importance of leadership, strategic vision, and tactical skill in medieval warfare. Paying close attention to their strengths and weaknesses as soldiers, both on campaign and on the battlefield, Hoskins also considers their contrasting characters and backgrounds as well as the military traditions of their time. The Black Prince was one of the most admired generals of his generation: a charismatic leader, decisive commander, and shrewd tactician and strategist. In contrast King Jean was impulsive, driven more by pride than by strategic priorities. When he was put to the ultimate test at Poitiers, Jean lost control of his army. Meanwhile, the Black Prince took the initiative personally to secure victory against the odds. Peter Hoskins analyses the leadership qualities of the prince and the king according to the principles of war enunciated by Sun Tzu and Vegetius as well as the modern principles of war of the United Kingdom armed forces. He gives readers a fascinating insight into the nature of command and the conduct of war in the Middle Ages.