No truth yet, just a different account. Now we have two versions, I suspect there is a version for everone involved. The facts are that an American unit ( self described as a ‘mobile force’) was isolated, surprised and almost wiped out or at least took heavy ( >50%) casualties.
I stick by my failure of command analysis.

BTW, when did the TO&E of a PIR expand to include enough vehicles to form a lager?
Back in the day, a PIR had two jeeps, one for the Sgt Major and one for the Col. AFAIK, they never actually went anywhere, but were kept back at the fort to help slow soldiers learn to concentrate. If a run of the mill trooper wanted a vehicle, he had to ‘borrow’ it. Normally from an armored unit, if one was handy.