The U.S. Army needs more horses for the Spanish-American War. Hoppy must turn his Bar 20 cowhands into Rough Riders to gather up the horses, and of course bad guys try to sabotage the operation.
as Hopalong Cassidy
as Lucky Jenkins
as Windy Halliday
as Barbara Allen
as Boots
as Black Jack Carson
as Major McCready
as Hawks
as Shorty
as Smokey
as Brad
as Jordan
as Fort Guard
as Henchman
as Major Jordan
as Army Lieutenant
as Courier
as Army Corporal
as Hoppy Man
as Henchman
as Fort Cook
