He established the essential rules of posture and footwork that still govern modern sport fencing, although his attacking and parrying methods were still much different from current practice. Although he intended to prepare his students for real combat, he was the first fencing master yet to emphasize the health and sporting benefits of fencing more than its use as a killing art, particularly in his influential book 'L'École des armes" ("The School of Fencing"), published in 1763. According to the "Encyclopædia Britannica", "Angelo was the first to emphasize fencing as a means of developing health, poise, and grace. As a result of his insight and influence, fencing changed from an art of war to a sport."