Ambush Bay (1966) DVD

A marine patrol secretly lands on the Japanese-occupied island of Siarago. Their mission: to locate a Japanese-American girl with vital information concerning General MacArthur's pending Philippine invasion. What they uncover instead is a Japanese plot to detonate underwater mines as the US fleet enters the bay. Cut off from outside communication, these brave marines must find a way to prevent what could be the worst naval tragedy from ever happening.