The All-Terrain Scout Transport was a type of walker developed by the Galactic Empire for its military.
A number were deployed on the sanctuary moon of Endor that were part of the Emperor's finest legion and were intended to be used to ambush the Rebels during their attack on the shield generator. They arrived at the scene when the Rebels were also present in order to ensure their quick surrender. However, the Imperial military were ambushed by the native Ewoks who used a variety of primitive traps and tricks to destroy several walkers. Despite these losses, the Empire managed to use their walkers to secure an advantage over their enemies until the Wookiee Chewbacca along with several Ewoks commandeered an AT-ST after which they turned its weapons against the others. This secured a Rebel victory allowing them to destroy the shield generator allowing their fleet in orbit to launch an attack on the Death Star II's core.
- The AT-STs were created by George Lucas where they made their first appearance in Star Wars: Episode V - The Empire Strikes Back.
In other media
- In Star Wars: The Force Unleashed, AT-ST's appeared as an enemy type in the setting of the action video game. A variant was shown as a boss enemy with this being called the AT-KT that was piloted by Imperial Governor Ozzik Sturn who managed the planet Kashyyyk after it was occupied.
- Star Wars: Episode V - The Empire Strikes Back: