Agile and lightweight - AT-RT walkers can move through challenging terrain to scout out the enemy's presence. The walkers are also used to patrol borders - giving their clone trooper drivers more mobility and better visibility than they would have on a foot patrol. AT-RT walkers are deployed during the Battle of Kashyyyk against the droid armies that attempt to take control of the jungle homeworld of the Wookiees.
These clone troopers are specially-trained to ride AT-RT walkers and are outfitted with armor and helmets designating them as drivers. AT-RT drivers are part of the 41st Elite Corps that is sent to Kashyyyk during the Clone Wars.