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American director Roy S. Luby (usually billed as S. Roy Luby) started out in the early 1930s as an editor of poverty-row westerns. Luby graduated to directing with 1936's Desert Phantom, then alternated between editing and directing for the rest of the decade. In the 1940s, he was busiest with "B"-western units at PRC and Monogram. Roy Luby's directorial output of the war years included the "topical" sagebrushers Cowboy Commandos (1942) and Black Market Rustlers (1943).