2-1B was a blue 2-1B Medical Droid that worked for the Rebel Alliance during the Galactic Civil War. He was based at Echo Base on the planet Hoth just a few years before the Battle of Hoth. He did surgery on Jedi Knight Luke Skywalker after the young jedi encountered a wampa during one of his scouting missions. Luke was so amazed by the droid's medical work, that after the Battle of Hoth, Luke asked for 2-1B to repair his arm after losing it during a duel with the dark Lord of the Sith, Darth Vader. He was also present on board a Rebel Cruiser during the Battle of Endor.

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