The Desert Patrol are a group of people led by John Sheppard that protect the New Texas Oilfields, which is the area around Verdammter Platz and Diep Gat. They will patrol that area and kill any robbers they find. Also, if you attack other Caravans or other Desert Patrol squads, then Desert Patrol squads that find you will attempt to attack and kill you. One of the two followable story lines in the game has you joining Desert Patrol.