Thanks to an unexpected loophole, the men of F Troop discover that they're not legally enlisted in the Army. Thus it is that every man in Fort Courage takes a powder, leaving Captain Parmenter (Ken Berry) alone to guard the fort. The situation gets dicier when the hositle Shug Indian tribe decides to mount an attack, forcing Parmenter to do some quick improvising to convince the invaders that the fort is fully manned. Former "Great Gildersleeve" Willard Waterman appears as ex-commander "Cannonball" McCormick. ~ Hal Erickson, Rovi