Tornin was sent with a Gunner detachment to explore the western edges of the Commonwealth, eventually stumbling upon the Nuka-World transit center. Someone deployed by raiders as lure to draw the Gunner squad to the cola-cars arena through the Nuka-Express was shot and killed after the Gunners saw past the ruse. The Gunners then decided to head towards Nuka-World through the mountains instead.
Somewhere along the journey, they lost contact with Gunner HQ and decided to set up a camp on the Bradberton overpass. Sergeant Lanier departed with a recon team to the Nuka-Cola bottling plant, leaving Tornin in command of the camp. Lanier's team was quickly overwhelmed by nukalurks, and a week later, Tornin dispatched a runner to headquarters for reinforcements.