Watch Blind Courage: The Unique Genius of Jan Žižka Full Movie on Vision Video An amazing military genius, Jan Zizka (c. 1360-1424), emerged to lead them. He took a handful of peasants, outfitted them with farm implements, and defeated more than 100,000 of the finest knights in the world. He revived military techniques not used since the Romans and developed a forerunner of the modern tank. All of this despite the fact that, for most of this period, he was completely blind. Director: Jerry Griffith