The greatest lost treasure of 60s and 70s westerns

Seriously, this movie has it all. Banditos, Mexican army, Apaches, lots and lots of nude women, huge battles, a huge body count, an incredible fortress, explosions, treasure, double crosses, buddy humor... You can't ask for a better action "guys on a mission" type western. It makes The Good The Bad And The Ugly seem mind-numbingly drab by comparison. I give this so many stars I can't count them.