"During the rise of the Empire, the Emperor's home planet of Naboo rapidly established itself as a major irritant. After a number of Naboo's ambassadors were sent home in various states of dismemberment, her newly elected Queen broke off diplomatic ties, and began exploring military options. Clearly it was time for a regime change, a change that would be effected by the 501st, now under the direct command of Darth Vader. Our orders were simple, to infiltrate the city, take out their leader, sending a clear signal to other potential troublemakers in the Empire."
January 1, 1970
https://en.wikiquote.org/wiki/Star_Wars%3A_Battlefront_II_(2005_video_game)