Come On, Rangers (1938)

Roy Rogers (Roy Rogers) is a Texas Ranger, guarding the land with his brother Ken (Lane Chandler) and their fellow Ranger buddies, until Texas gains statehood and the Rangers are shut down to make room for the U.S. Cavalry. Roy soon joins the new group, falls for colonel's daughter Janice (Mary Hart), and tries to move on to a new life. But when a group of outlaws murders Ken, Roy decides to leave his post, gather his old friends and administer frontier justice in a way only the Rangers can.