World War II rages 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 (fellow Academy AwardO winner* Patricia Neal). Vice Adm. Charles Lockwood, World War II commander of all U.S. Pacific submarines, was technical advisor for this adventure packing real you-are-there thrills!