|Robert Colman||Michael 'Beau' Geste|
|Neil Hamilton||Digby Geste|
|Ralph Forbes||John Geste|
|Alice Joyce||Lady Patricia Brandon|
|Noah Beery||Sgt. Lejaune|
|Norman Trevor||Maj. de Beaujolais|
Brothers Digby, John and Michael ''Beau'' Geste are stunned to learn that their financially troubled aunt, Lady Patricia Brandon, has stolen a precious gem. Determined to prevent the woman's arrest, Beau, Digby and John all step forward and claim to be the thief. But, instead of ending up in jail, the Geste boys quickly sign up for duty with the French Foreign Legion in Africa, where their military hitch proves to be a brutal one.