The Steel Claw (1961) Sub Indo

A Marine stationed in the Philippines loses a hand in an accident and is discharged from the Corps. When the Japanese invade the Philippines, he is called back into service to rescue a general held by Filipino guerrillas behind Japanese lines. Attaching a steel prosthetic in place of his missing hand, he and his men set out on the mission, which turns out to be not quite what he was told it was.