All Terrain Armored Cargo Transport

The All Terrain Armored Cargo Transport (AT-ACT) was a larger version of the standard All Terrain Armored Transport combat walker that featured a dedicated cargo bed for the transportation of heavy building materials or combat munitions.

Description
The All Terrain Armored Cargo Transport was deployed at major Imperial construction projects, such as shipyards and sprawling research installations. Although the AT-ACT was not built for combat it was still capable of posing a formidable threat to infantry as discovered by Rebel troopers during the Battle of Scarif. The walker's taller profile gave it a faster stride than an AT-AT, although at the expense of structural stability. To give the knee joints extra strength when carrying cumbersome loads, an electromagnetic tensor field kept the overstressed motive assembly in smooth alignment. The cargo module housed within the AT-ACT's frame encompassed nearly 550 cubic meters of space and was capable of carrying raw material. Loads were carefully managed by stevedore droids who divided up partial holds of ultradense materials into manageable rips. Powerful engines and tensor field-supported legs kept the massive AT-ACTs moving forward, from mining sites to processing facilites, carrying cargo in situations where repulsorfields were unreliable or not suitable due to material incompatibilities.

The AT-ACT's design did not boast a specialized driver corps, as it was not technically designated a battlefield assault vehicle. Imperial combat assault tank pilots, AT-AT pilots, and other imperial combat drivers in the Imperial Military were all qualified to operate it.

History
At least four AT-ACTs were present on Scarif in a battle against a squad of Rebel soldiers. When the rebel incursion threatened the security of the Scarif Citadel, Director Krennic ordered the beach secured, and the ground crews seized this initiative to move their AT-ACTs into action. They proved resistant to the weapons of the Rebel troops, but took losses when faced with X-Wings and U-Wings. They, along with all the other Imperial and Rebel forces in the area, were destroyed when Wilhuff Tarkin ordered the Death Star to fire on Scarif.

After the Battle of Endor, the walkers were among the forces deployed to defend Kuat Drive Yards during the New Republic's siege against the shipyards.

Behind the scenes
The first footage of the AT-ACT was shown in the Rogue One: A Star Wars Story teaser trailer on April 7, 2016. The walker was identified as AT-ACT in a preview of the canceled reference book Rogue One: A Star Wars Story: The Official Visual Story Guide on May 17, 2016. The full name was first revealed in the third episode of The Star Wars Show on May 25, 2016.

Appearances

 * Rogue One: A Star Wars Story
 * Rogue One: A Star Wars Story novel
 * Star Wars: Commander