During the Spanish-American War, Colonel Teddy Roosevelt's Rough Riders are short of horses, and Hopalong Cassidy and his Bar-20 friends are detailed to round up a bunch of wild horses, but a renegade and his gang are out to stop the roundup.
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Cast:
William Boyd - Hopalong Cassidy
Russell Hayden - Lucky Jenkins
George 'Gabby' Hayes - Windy Haliday (as George Hayes)
Judith Allen - Barbara Allen