Sundown Jim (1942)

Newly appointed Marshal Sundown Jim arrives to find three groups fighting each other: Moffitt, his henchman Brick and gang, Barr and his sons, and Hyde with the Oldroyds. When Moffitt and Hyde join up and Moffitt kills Barr, Jim convinces the Barr sons and the Oldroyds to join him and together they go after Moffitt and his men.