NR - N99 Persuader - class droid enforcer / Legends The NR - N99 " Persuader " - class droid enforcer , colloquially known as the Corporate Alliance tank droid , CAD and the snail tank , was a tank droid constructed by the Corporate Alliance at first to silence its opposers and later to combat the Grand Army of the Republic . Description . The tank droid was a six - meter tall automaton with a huge , central drive motor for locomotion supported by four small outrigger wheels . It could also roll on its single traction drive tread . The tank droid was also equipped with a pair of large outrigger arms connected to either side of the drive motor which could be armed with almost any weapon . The " Persuader " - class ' s front featured several sensors above its twin photoreceptor eyes . Because of its forward drive motor , the tank droid was not an especially maneuverable vehicle and was very easy to engage when being flanked . To compensate for this , the tanks deployed in tightly packed waves , forming a wall of armor . At a speed of 60 kilometers per hour , the tank had no trouble ramming through walls and mowing down obstacles in its way . Civilians particularly feared the NR - N99 because unlike the IG - 227 " Hailfire " - class droid tank and OG - 9 homing spider droid , which would generally avoid civilian targets , the tank droid would simply crush everything in its path with merciless precision . History . Before the Clone Wars , the tank droid was deployed by the Corporate Alliance against Outer Rim worlds that opposed its development plans or protested against its unfair business practices . It was one of the contributions of the Corporate Alliance to the droid armies of the Confederacy of Independent Systems . During the Clone Wars , the droid enforcers were equipped with conventional ion cannons and heavy repeating blaster cannons . For special missions , these could be replaced by concussion missile launchers , homing missiles , dumbfire torpedoes , and thermal grenade launchers . The tank droids were used to accompany larger vehicles such as the " Hailfire " - class droid tank or OG - 9 homing spider droid . In most battles , a pair of NR - N99s would work together to protect a homing spider droid , though three droid tanks were required to adequately defend a " Hailfire " - class droid tank . The droid enforcer , with its huge central wheel , could also crush to death any unfortunate enemy soldier that got into its path . The Corporate Alliance installed voice modulators into the " Persuader " - class late in the Clone Wars . A few variants were lucky enough to have passenger space replaced with defensive laser cannon turrets to help destroy enemies if it should be flanked . The Corporate Alliance tank droids participated in the First Battle of Geonosis , and many other battles during the Clone Wars , such as the Battle of Thule in the Dark Reaper Crisis , although they were lesser used than other Separatist armor . NR - N99s also participated in the Battle of Malastare , but , like every other droid alongside them , were neutralized by the Republic ' s Electro - proton bomb , the Battle of Kashyyyk , where , in the role of spearheading an armored assault , they formed the bulk of the Separatist mechanized forces , and the battle at Cato Neimoidia . The tanks were deployed during a Trandoshan / Confederacy of Independent Systems attack on Kashyyyk and participated in the Rebellion on Felucia . Following the execution of the Separatist Council by Darth Sidious ' s new apprentice , Darth Vader , all NR - N99 droid enforcers were de - activated . Behind the scenes . The NR - N99 " Persuader " - class droid enforcer was originally designed to appear in " " . In the game " " , this droid is featured as the Confederacy assault mechanism and is larger , slower , and more powerful than how it is seen elsewhere . This may be due to the fact it hadn ' t appeared in a movie yet , and its design was adopted for the game from concept art for " Attack of the Clones " . Alternatively , this may have been a larger design of the same basic chassis , much as the HAV / w A6 Juggernaut could be seen as a larger model of the A5 . In the game " " , the NR - N99 ' s heavy repeating blaster cannons are replaced with shock rifles that can shoot up to ten explosive shells at once and it is called an Armored Tank Droid . LEGO produced three sets depicting the Corporate Alliance Tank Droid ; the first in 2005 ( as part of a set named " Wookiee Attack " ) , the second in 2009 , and a remake of the 2009 one in June 2013 .