Towards the end of the 16th century three outstanding commanders brought Japan's century of civil wars to an end, and even though reunification was first achieved under Toyotomi Hideyoshi, it was his successor Tokugawa Ieyasu who was to ensure a lasting peace. In terms of his strategic and political achievements Ieyasu ranks as Japan's greatest samurai commander. His battlefield prowess, however, needs careful consideration before accolades are offered,...