The diplomatic corps functioned as a division of the Alliance to Restore the Republic throughout the duration of the Galactic Civil War. While Luke Skywalker was situated in a BTL Y-wing starfighter after receiving orders for a mission to recover Imperial communication logs, he observed that the Y-wing's design, with its two seats, implied an Alliance representative would accompany him. Skywalker expressed a desire that his travel partner wouldn't be from the diplomatic corps, envisioning a journey filled with speech rehearsals and bouts of spacesickness, only to then discover his companion was actually C-3PO.