AM General was the military contract division of AMC. AMC was the parent company of Jeep.
In 1983 AM General was spun off and sold to LTV Aerospace so AMC could get some much needed cash. Chrysler bought the remaining AMC property a few years later. And, as we all know, AMC ceased to exist at that point and was absorbed into Chrysler.
AM General is the last extant vestige of the once-great AMC empire. The Hummer is technically a Jeep (because it started off life as a AM/Jeep product) and it still has the Jeep seven slot grille.
Apparently AM General wants Jeep at this point.
LOL. This child of the Sixties can only guess the empire you speak of was in something other than automobiles (e.g. those military vehicles) or was gone before my time. I only remember AMC for the Ramblers, Nashes, Studebakers, Packards (in name only), etc. I won't even mention those caricatures-on-wheels of the Seventies. :O)