Steel Dawn

Steel Dawn is a 1987 American postapocalyptic feature film that mixes the genres of science fiction, western and samurai cinema. It stars Patrick Swayze and his wife, Lisa Niemi.

An enigmatic swordsman named Nomad Patrick Swayze, wanders through the desert in a postWorld War III world. He searches for his mentors killer, the assassin Sho Christopher Neame. The war itself is never described, but there are hints that a new government rose soon afterwards, though it has lost power since.In the past, Nomad had a position of privilege as a soldier of the elite guard. Since firearms are no longer available, edged weapons have been revived as the standard fighting tools. The elite guard mastered the use of swords and carried them in an unusual, upright fashion. Nomads family were, in some way, killed and this continues to torture him. ........

Source: Wikipedia