Sergeant Lee is a soldier in the New California Republic Army, 5th Battalion, 1st Company. In 2281, he is the commander of the strike force sent to retake the NCR Correctional Facility from the Powder Gangers. If the facility is retaken, He is put in charge of NCRCF.
He is located between Primm and the NCRCF compound only if Eddie is betrayed during I Fought the Law. Otherwise he will be encountered when the NCR raid the prison while the Courier is inside backing up the gangers.
"I'm Sergeant Lee. Lieutenant Hayes radioed ahead to say you were on the way. We've got surprise on our side, and that's about it. Once we blow a gap in the fence, we've got to pour on the fire and keep them disorganized."