Loosely based on "Wyatt Earp, Frontier Marshal" by Stuart N. Lake. The characters were changed and only certain incidents from the book were used.
1st of two films released in 1953 co-starring Rory Calhoun and Cameron Mitchell; the 2nd was Come sposare un milionario (1953).
Corinne Calvet's character is based loosely on notorious gambler Eleanor Dumont, who dealt cards at the Bella Union in the 1860s after she sold her gaming hall in California.
Italian censorship visa # 15345 delivered on 5 November 1953.