The War: World War II, Pacific theater.
The Men: Force 316, a multinational, four-man commando unit specializing in jungle warfare (starring William Holden and Jack Hawkins).
The Mission: Destroy a bridge over the River Kwai that is being constructed by British prisoners of war under Japanese supervision.
The Twist: The bridge is only approachable by trekking through a vast jungle. The mission's most daunting challenge is to destroy the bridge without killing the British soldiers.

Bridge on the River Kwai, William Holden, 1957. Photo courtesy of the Everett Collection.