Death Force is a 1978 action film directed by Cirio H. Santiago and starring Leon Isaac Kennedy. The movie follows the story of Doug Russell, an American soldier who steals a shipment of gold in the Philippines with his two Vietnam War buddies, Marelli and Maghee. After betraying him and throwing him overboard, Doug washes ashore an island inhabited by two Japanese soldiers stranded there since World War II. The Japanese soldiers nurse him back to health and teach him the art of the samurai and martial arts.
After returning to America, Doug discovers that his treacherous former partners have muscled their way into the Los Angeles mafia turf, using their new-found wealth to control the city's criminal underworld. With his new skills and allies, Doug sets out to take down Marelli and Maghee and put an end to their reign of terror.
The movie features intense action sequences, including gun battles and martial arts fights. It also explores themes of trust, loyalty, and betrayal. Overall, Death Force is an entertaining action movie that combines elements of martial arts, samurai culture, and organized crime.