Featured in: Star Wars, A New Hope (1977) and it sequels
The Rebel Alliance or the Rebellion, is an interstellar faction of the Star Wars universe. As a direct reaction to the Galactic Empire, the Rebel Alliance warred throughout the Star Wars galaxy for restoring the ideals and format of the Old Republic. it was a resistance movement formed by Bail Organa and Mon Mothma to oppose the reign of the Galactic Empire. It was established in year 2 BBY.
https://starwars.fandom.com/wiki/Alliance_to_Restore_the_Republic