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Production information
Product line

All Terrain series[2]



Technical specifications

8.6 meters[4]

Maximum speed

90 km/h[4]

Engine unit(s)

PowaTek AH-50 energy cell[1]

Sensor systems

Ground-penetrating sensor systems[2]

  • Taim & Bak MS-4 twin blaster cannon (1)[1]
  • Light E-web twin blaster cannon (1)[1]
  • Dymek DW-3 concussion grenade launcher (1)[1]
Cargo capacity

200 kilograms[4]

  • Anti-personnel[3]
  • Reconnaissance[2]
"AT-STs will no longer be deployed on planets with an abundance of trees or other known obstacles such as rock-wielding primitives."
AT-ST service manuals, post-Battle of Endor

The All Terrain Scout Transport (AT-ST) was a bipedal walker used in rudimentary form by the Galactic Republic during the late Clone Wars[6] and, later and more extensively, the Galactic Empire during the Galactic Civil War.[7]




Main design

AT-ST schematics.

Colloquially known as a "chicken walker" because of its shape and walking motion, the AT-ST was a heavily armed light ground combat vehicle. It was equipped with a chin-mounted double medium blaster cannon, a concussion grenade launcher on the starboard side of its head, 2 durasteel feet with claws, and a blaster cannon on the port side. It was designed to be a recon hit and run vehicle. It was lighter than its bigger brother the AT-AT walker and could withstand standard blaster fire, but was vulnerable to heavy laser fire and missiles.[8]

The chin guns had an effective range of two kilometers and were used for anti-vehicle attacks, while the blaster cannon and grenade launcher provided close-range protection against infantry and light emplacements.. AT-STs were piloted by a crew of two drivers.

The bipedal propulsion system was one of the primary weaknesses of the AT-ST. While on even terrain the walker could achieve over 90 kilometers per hour, but on uneven or shifting terrain a walker could quickly become unbalanced enough to fall over.[7]



The Assault version of the AT-ST featured longer legs, a heavy, chin-mounted blaster cannon and a completely enclosed cockpit.


This variant was equipped with big weapons-mounts fitted to the upper portion of each leg of the walker. They were used in guerilla warfare against Wookiees.[9]


The AT-CT variant was an AT-ST walker fitted with arms for use in construction. Though not designed for combat, the AT-CT could use the anti gravity beams on the side of the cockpit to lift an object and hurl it, repusling it with enough force to make it a potent anti infantry weapon, as it could use the surrounding environment as a weapon.[10]



During the Clone Wars, the first AT-RCTs were developed. They had an open cockpit design, where the pilot and gunner sat one in front of the other.[11]


"It is best to deploy AT-STs in urban environments. The fear inspired is usually enough to get the job done."
AT-ST service manuals

Early on in the Clone Wars, engineers at Rothana were busy developing a new bipedal walker, known as the All Terrain Scout Transport, following their construction and testing of the AT-XT. The AT-XT enjoyed moderate success during its somewhat brief operational time, but was rarely used during the war.[12]

The earliest models would be deployed by the Grand Army of the Republic during the latter stages of the Clone Wars. The conflict would also see the debut of several other bipedal walker designs, like the AT-RT.

Under the Empire, Balmorra was the center of AT-ST production. The AT-ST was later viewed by Imperial commanders as a highly versatile weapon, excelling against infantry and lightly armored vehicles, but also useful for protecting vital units and patrolling hostile areas.

View of an AT-ST cockpit.

AT-ST's were used by Blizzard Force during the Battle of Hoth. The Blizzard Force AT-ST was especially modified for polar climates, as were all the vehicles used on Hoth. It was equipped with ground penetrating sensor equipment that could detect instabilities in the permafrost and relay information back to the heavier vehicles, thus ensuring they avoided unstable ground.[2] The walkers had a unit insignia consisting of a horned helmet.[13] In the Battle of Endor, AT-ST's were deployed by the Empire against the Rebel and Ewok ground troops. The walkers were very effective against these troops, until many of them were destroyed by Ewok traps and another AT-ST hijacked by Chewbacca with the help of some Ewoks.[7]

The AT-ST's problem with shifting terrain was demonstrated during the Battle of Endor, when Ewoks released a large pile of logs and stones to roll down the hill into the path of an AT-ST. The walker was unable to handle the rapidly shifting ground, and despite attempts by the pilot to stabilize the vehicle, it fell on its side and was destroyed. The Ewoks also used strategically-positioned logs hanging from trees to eliminate several other walkers.[7]

The Imperial Remnant would go on to use AT-STs, though not as extensively.

Behind the scenes

The AT-ST model used on Hoth. Unit insignia seen on the side.

An early scout walker concept was used in the Revenge of the Sith comic adaptation.[11] This was derived from Episode III concept art made by Ryan Church.[14]

The RotS script referred to the AT-RT walker as a "modified scout walker", which may imply that this two-man design was the basis.

More scenes with the AT-ST were filmed for the original trilogy movies, but George Lucas decided that the AT-ATs would be more impressive and that the AT-ST would look better in close quarters.

The AT-ST model received some cosmetic changes for its extensive appearance in Return of the Jedi, thus explaining the minor differences in the models used for the two films.[15]


Non-canon appearances

Wookieepedia has a collection of images related to All Terrain Scout Transport.
  • Star Wars Infinities: A New Hope
  • LEGO Star Wars II: The Original Trilogy
  • LEGO Star Wars: The Complete Saga
  • Star Wars Infinities: The Empire Strikes Back
  • Star Wars Infinities: Return of the Jedi
  • "Collapsing New Empires" - Star Wars Tales 19 (Ambiguously canonical source)


Notes and references

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Star Wars: Complete Cross-Sections
  2. 2.0 2.1 2.2 2.3 Star Wars Titanium Series AT-ST (Hoth)
  3. 3.0 3.1 3.2 Star Wars Episode V: The Empire Strikes Back
  4. 4.0 4.1 4.2 4.3 4.4 Star Wars: Behind the Magic
  5. Battlefront II: Prima Official Game Guide
  6. Star Wars Episode III: Revenge of the Sith (novel)
  7. 7.0 7.1 7.2 7.3 Star Wars Episode VI: Return of the Jedi
  8. Star Wars: The Visual Dictionary
  9. The Force Unleashed
  10. The Force Unleashed
  11. 11.0 11.1 Star Wars Episode III: Revenge of the Sith (comics)
  12. Star Wars: The Clone Wars video game
  13. Star Wars Technical Journal (Volume Two)
  14. The Art of Star Wars Episode III: Revenge of the Sith
  15.  All Terrain Scout Transport (AT-ST) in the Databank

See also

External links

This article uses material from the "All Terrain Scout Transport" article on the Starwars wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.


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