Gen. Patton's tank corp had a large training area that covered part of Nev. Ariz. and Calif. Camps at Bouse Az.and Hyder too name a couple. I believe the army air corp. had a base at Signal Az. Luke was also a army air corp. base. You might want to check out the Navjo army depot outside flagstaff az. Not sure how long it has been around.Hope this will help.