thank you all for your nice comments and likes.
Mike as you know I use the polystyrene to build the base. Then I spread a couple of stucco coats with a slice, when dried I sand it.
Jazzeum you are right, I believe these forts were located in the south, Fort Bliss, Bent's Old Fort or Fort Craig may be close to this kind of structure. As I said I was inspired by a picture taken in the K&C office by TomNT, I enclose his shot.
Scott I remember that movie, it is an Italian film and the mounted (Confederate) actor is Bud Spencer, alias Mr. Carlo Pedersoli born in Naples. Really the story was set in New Mexico.
Cheers