EXD-9's infiltration of Chopper Base

In 2 BBY, the Imperial Grand Admiral Thrawn began deploying E-XD-series infiltrator droids to several Outer Rim planets. One of them, EXD-9, landed on Atollon, home of Phoenix Cell's Chopper Base. EXD-9 was soon ambushed by several krykna spiders and knocked out. The damaged Infiltrator droid was later found by Captain Garazeb Orrelios and Chopper, who brought the droid back to their base. Mistaking EXD-9 for a protocol droid, they assigned it to help AP-5 manage the base depot's inventory. After learning that EXD-9 was an Imperial Infiltrator droid, Orrelios, Chopper and AP-5 joined forces to overpower and deactivate the droid. To prevent the Empire from discovering the location of Chopper Base, the rebels sent it back to its Star Destroyer with its proton warhead set to detonate when the droid reconnected to the Imperial network. EXD-9 subsequently managed to destroy the Star Destroyer, but the incident helped Thrawn narrow down his search for the rebel base to the 94 systems where the droids had been sent.

Text and facts from the “EXD-9's infiltration of Chopper Base” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.