Miyamoto Musashi, who lived in Japan in the 1600s, was an undefeated dueler, a masterless samurai, and an independent teacher. He spent the last decades of his life refining and teaching his military science.

Miyamoto Musashi, who lived in Japan in the 1600s, was an undefeated dueler, a masterless samurai, and an independent teacher. He spent the last decades of his life refining and teaching his military science. Less