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.
William Boyd
Hopalong Cassidy
Russell Hayden
Lucky Jenkins
George 'Gabby' Hayes
Windy Halliday
Judith Allen
Barbara Allen
Billy King
Boots
Alexander Cross
Black Jack Carson
Karl Hackett
Major McCready
Bob Kortman
Hawks
