Cattle Stampede (1943)

"HE'S A TRIGGER-QUICK GUY! And The Toughest Badmen Can't Stop Him (original poster)"

Billy the Kid and Fuzzy Jones are on their way out of Arizona being chased by some riders who hope to cash in on the reward money for their capture. They are warned in time by Ed Dawson, but Ed is wounded in the getaway. They get a doctor to attend to Ed. The latter tells them there is a range war in progress across the border and that he is looking for men to help make a cattle drive to the rail junction.