Always liked the M-7 Priest after seen some in a parade as a kid.
I normallly build U.S.A.F. Security Police armor, but there were not many types used since the beginning fo the A.F.
If you get to soft skins, from the VIetnam era woiuld be the:
CJ-5 jeep
M-35 2 1/2 ton
M-151 jeep (new)
M-715 weapons truck This has only been done in a 1/72 version and needs to come out larger.