Es das letzte Kriegsjahr des Zweiten Weltkrieges: In dem Boot Camp von Biloxi, Mississippi, werden die Rekruten auf den Einsatz im Krieg vorbereitet. Unter ihnen Eugene Morris Jerome, frisch aus Brooklyn transferiert, mit seinen 20 Jahren noch am Anfang seines Lebens stehend. Auch wenn die Situation nicht gerade dazu einlädt, möchte Eugene ausgerechnet in dieser Umgebung zum Mann reifen – gerade in sexueller Hinsicht. Von diesem ambitionierten Vorhaben soll ihn auch nicht sein exzentrischer Drill-Sergeant Toomey abhalten …

In 1897, little Priscilla Williams, along with her widowed mother, goes to live with her army colonel paternal grandfather on the British outpost he commands in northern India.

U.S. Marine Sergeant O'Hara has his hands full training raw recruits, one of whom, 'Skeets' Burns, is a particular thorn in his side. If Burns's lackadaisical approach to the military were not bad enough, he also makes advances on nurse Nora Dale, whom Sergeant O'Hara secretly loves. Nora is oblivious to O'Hara's feelings and is attracted to the handsome 'Skeet.' But an indiscretion turns her against him, and it takes an expedition to China and a battle with a warlord's bandit brigade to sort things out among the nurse and her two Marines.

Bugs Bunny gets a draft notice by mistake and joins the army, with disastrous results, especially for the sergeant of his platoon.