In 1906, Col. Hatch (Roy Gordon) is stationed in the Philippines and ordered to withdraw his forces from the island of Mindanao. Worried that an insurgent army headed by the ruthless Alipang (Tetsu Komai) will slaughter Filipinos and seize power, Hatch recruits a group of tested military officers -- including Bill Canavan (Gary Cooper), a military doctor, and McCool (David Niven) and Larson (Broderick Crawford), two rambunctious Lieutenants -- to train the locals.