Back in the nid-60s, I joined the Wisconsin Army National Guard as a mortarman. As the senior, training guy in the platoon, I was the Platoon Sergeant as a Spec-4 and had to take the MOS test. I did all of the studying for it, and to my surprise, that included the Davy Crockett! Interesting weapon, with the launcher mounted to the rear corner of a jeep.
They put these critters under the direct command of Spec 4s.
You just know that froze the blood of the Russians down range!