I was an artilleryman in the 11th Armored Cavalry Regiment (many years ago) so I can provide firsthand experience about such a unit. Even in the army few soldiers know much about the Armored Cav. There are not many of these units around. When I was assigned to the Armored Cav I thought, "Huh? I am artillery, not cavalry. There must be some kind of mistake. What am I going to do, charge about on horses or something?" To my surprise there was indeed artillery (a single battery of 8 self-propelled howitzers) and yes, the unit charged about constantly on field manouvers.