  My Darling Clementine was set in Tombstone, Arizona. Not New Mexico.  The Horse Soldiers was set in Tennessee and Mississippi. While the objective was to reach Baton Rouge, the film ends as the yankees are riding on their way out of Mississippi but not yet in Louisiana.   Both films, as with others listed here, are real classics!  Oops:o Ah..Arizona, New Mexico..what's the difference? One deserts the same as the next right?:p