World War II rage across the Pacific and Lt. Cmdr. Duke E Gifford is in the thick of it. he evacuates children from enemy-held islands. oversees the development of torpedoes at Pearl Harbor. And prowls the depths in the submarine Thunderfish for a chance to aim his improved 'tin fish' - torpedoes - at the enemy.

John Wayne plays Gifford in Operation Pacific. 'I'm no theory man. I'm a line officer', Gifford barks. He backs it up with lots of bite in several feverish sea battles. He's also a man of heart with a loving wife at home. Vice Admiral Charles Lockwood, World War II commander of all U.S. Pacific submarines, was technical advisor for this adventure packing real-you-are-there thrills!