Hooah old-duff,
Au contraire....the US Military did have Model A's of various types. Here, for example, are two Army Ford Model A Phaetons (note the "For Official Use Only" on the door):
...or how about this Army Ford Model A Sedan:
The Navy and Marine Corps also had Model AA trucks in various configurations.
The Ford Model A's in the US Military were only used as staff cars however.....AA's could be used in both a garrison and field environment.
Has anyone ever seen a military service manual for these vehicles? Was there such a manual? How about a regulation specifying the paint scheme and lettering for these vehicles?
Fordially,
Brad in the US Army in Maryland