A protocol droid at the Rebel's base on Hoth, R-3PO was present when the Imperial Forces attacked Echo Base, which had to be abandoned to the enemy. Protocol droids were vital in smoothing differences encountered by the many far-flung cultures interacting on a regular basis throughout the galaxy. Programmed in etiquette and equipped with formidable language skills, they served as aides to diplomats, politicians and other high-ranking officials.