Combat drivers are lightly armored, relying instead on the thick skin of their vehicles to protect them in battle. The commander stays in contact with his crew and with headquarters to keep updated on changing combat conditions.[49] This type of troopers were introduced in the 2016 Han Solo comic book series, and made their on-screen debut in Rogue One. Patrol Troopers are enforcement-based stormtroopers, commonly found in large cities with particular strategic importance where they take the place of local security forces.