Trevura

Trevura was an Imperial-controlled Inner Rim planet with a prominent droid population. At some point between 0 BBY and 5 ABY, an underground droid resistance group on Trevura hired the assassin droid S-R6 to kill the local governor, Merno Blask. In response, Blask arranged for a recently developed anti-droid inhibit setting for blasters to be field-tested in Voma, the planet's capital.

During that time, a group of Rebel Alliance agents, seeking to escort a vital astromech droid off-planet, killed a pair of Imperial stormtroopers equipped with the experimental inhibitor guns. Shortly afterward, S-R6 established contact with the Rebels and met them at his garage, whereupon stormtrooper reinforcements engaged everyone present at the structure in a fierce firefight.

Text and facts from the “Trevura” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.