"Watching the skies."
―An AT-AA pilot[src]

The All Terrain Anti-Aircraft (AT-AA) was a quick-moving, quadrupedal, mobile anti-aircraft walker used by the Galactic Empire.


Eaw at-aa

Multiple views of an AT-AA.

The AT-AA had four stubby legs and lizard-like locomotion, along with a low profile not seen in other Imperial walkers. On most models, the only weapon was a turreted flak pod, capable of firing several types of ordnance.[3] Other versions could be equipped with one or three rocket-launching tubes.[2] Initially the AT-AA had an inability to fire at ground targets. This was partially rectified with the addition of gun ports to allow the crew to fend off infantry attacks.[2]

Some variation had flak pods replaced with concussion missile launchers.[2] The AT-AA also carried electronic countermeasure systems that could scramble missile guidance systems, thus lowering the risk of missile strikes.[3]


"Move! Move!"
―Unnamed AT-AA pilot[src]

AT-AAs firing.

Its preliminary designs were developed as far back as the Clone Wars, and the design began production early on in the time of the New Order.[3] The walker saw action during the Galactic Civil War, where it was used against aircraft, but was useless against any ground vehicles.[2] Although the troopers aboard could fix blaster rifle mounts on the vehicle, the AT-AA still relied heavily on escorting vehicles.[3]

During the Battle of Kalaan, AT-AA batteries protected the armored columns from airborne enemies, bringing down scores of Alliance T-47 airspeeders.[5]

AT-AAs were used even in the time of the New Republic, where they defended the galactic capital from the New Republic Defense Force.[4]

Behind the scenesEdit

The AT-AA is the only Imperial siege weapon originating from the Expanded Universe to appear in all three of the major Star Wars RTS games.[6][5][7]



An AT-AA with a missile tube.


Notes and referencesEdit

Walkers of the Galactic Empire
Reconnaissance/light support
All Terrain Advance Raider · All-Terrain Exploration Droid
Light All Terrain Personal Transport · All Terrain Personal Transport
All Terrain Recon Transport · All Terrain Scout Transport
All Terrain Scout Transport/Assault · Mountain Terrain Scout Transport
Heavy support/troop transport
All Terrain Armored Transport · All Terrain Tactical Enforcer
All Terrain Tactical Enforcer (cargo transport) · Shadow AT-AT
Self-propelled artillery
All Terrain Attack Pod · Self-Propelled Medium Artillery
All Terrain Anti-Aircraft · All Terrain Ion Cannon