Battle of Zaloriis The Battle of Zaloriis marked the debut of a new model of All Terrain Armored Transport , secretly researched and constructed on Zaloriis by then - Colonel Maximilian Veers . Prelude . In the time following the Battle of Yavin , the population of Zaloriis was growing more and more tired of the Imperial presence on the planet , including the bizarre experiments with walking machines being conducted by Imperial military . Summoned to a meeting with the Zaloriis Minister Transe Decar , Darth Vader walked into a trap , as the rebellious Minister had his troops capture Vader ' s men and hold him hostage . With little effort , all Zaloriis militia members present were killed by the Dark Lord . He then proceeded to interrogate one of the soldiers as to the location of the captured Imperials . Upon deducing the location of the detention compound , he and his Stormtrooper squad proceeded to head towards it , and freed the troops . The battle . After regrouping and gathering intelligence on the situation , Vader learned that Colonel Veers had been captured by the local militia and was sentenced to be executed . Ambushing the prison convoy , composed of a column of two mounted troopers and six Zaloriis militiamen , Vader and his troops freed the Colonel , and also recruited several heavy mounted troopers in the process . Upon being informed by Veers about Fondor II being under attack , Vader proceeded towards the city of Fondor II , where they were able to call for reinforcements after wiping out some Rebels . Vader then assigned some Banthas he and his forces gained on the way over to one of the camp ' s nurseries . To gain an advantage in the coming battle , it was decided to liberate the prototype AT - AT walker from the research facility of Camp Culroon . Upon retrieving the walker , " Blizzard 1 " , Vader also managed to gain command of by five heavy Dewback troopers , five repeater troopers , two AT - PTs , two AT - STs , two AT - AAs and five workers , as well as stockpiles of food , ore , carbon and nova crystals . The Galactic Emperor Palpatine then contacted Darth Vader and commanded him to send his forces to subjugate Zaloriis City for its treachery . At the suggestion of Veers , " Blizzard 1 " was then moved to Fondor II , with one worker being commanded to remain in order to create a carbon processing center in Culroon . Along the way , Vader later had a missile trooper and a worker stop by an ore crystal field , to create a command center and some prefab shelters . Two repeater troopers were also deployed near the construction area , in case the Rebels spotted the development . In addition , some mounted troopers and Mobile proton torpedo launchers ambushed the convoy and attempted to destroy the " Blizzard 1 " , although the escorts drove them off with minimal effort . Upon arriving at Fondor II , the " Blizzard 1 " was placed in its hangar , where it received armaments and was made ready for battle . Several Rebel soldiers then were deployed from Zaloriis City to attack an area near the oasis , but several turrets kept them at bay . Vader then sent several workers to mine for nova crystals , carbon and ore deposits near his landing site . Afterwards , taking advantage of the strained defenses of the Rebels due to the desert turret keeping their forces busy , Vader sent three heavy energy pummels and three heavy artillery platforms to overwhelm the Rebel ' s standing army , with a squad of ten repeater troopers and five anti - air troopers also being sent to back them up . The heavy artillery platforms then proceeded to demolish the turrets guarding Zaloriis City . The Rebels stationed inside , as a last resort , then proceeded to scramble several X - wings and Y - wings to take out the advancing Imperial forces , although many were shot down by the missile troopers . The artillery then weakened the walls enough for the pummels to demolish them . Vader then ordered for Veers to do a test - drive of the " Blizzard 1 " on the city . Two Rebel fortresses had been established with the help of the Zaloriis government , and these would bear the brunt of the attack . The AT - AT prototype figured prominently in the onslaught , impressing the Imperial commanders and demoralizing the Zaloran rebels . At the height of the battle , Zaloriis City was devastated by Imperial guns , most notably the ones attached to " Blizzard 1 " . Aftermath . After the capital had fallen , Veers searched the city library ' s archives for any information on the Alliance ' s hideouts . It was then discovered that the Rebels had fled to a new location , somewhere near Elrood . Behind the scenes . The Battle of Zaloriis was first mentioned in the to the 2001 video game " " during the Darth Vader campaign . The mission and thus the battle was also included in the game ' s 2002 expansion pack , " . "