Bruce was a member of Drax Squad, one of the teams of Sandtroopers sent to Tatooine to recover the Death Star plans Leia Organa had taken. Nardass led this squad in conjunction with Zeta and Alvien squads, along with a Dewback Patrol. Once it was discovered that the plans hadn't simply been hidden in the ship, and it was actually Droids carrying them, the squads split up. Alvien went directly to Mos Eisley, the largest spaceport in the vicinity, in an Imperial Troop Transport and set up roadblocks.
Drax also went to Mos Eisley, albeit on foot. They were unable to get to Mos Eisley before Luke Skywalker and the droids did. Once the mission was deemed a failure, the squad was relieved.