Saarn

An isolated world hidden in a corner of the galaxy, Saarn was used by the Rebel Alliance for military training purposes, and was later used as a remote surveillance outpost after the New Republic moved to Coruscant. Five years after the Battle of Endor, one of Grand Admiral Thrawn's Star Destroyers, the Stormhawk, executed a hit-and-fade attack on Saarn, wiping out the New Republic personnel and setting up a listening post to protect the movements of Thrawn's fleet. [SWAJ]