Alliance to Restore the Republic (Earth-2042)

"We, the Rebel Alliance, do therefore in the name—and by the authority—of the free beings of the galaxy, solemnly publish and declare our intentions: To fight and oppose you and your forces, by any and all means at our disposal. To refuse any Imperial law contrary to the rights of free beings. To bring about your destruction and the destruction of the Galactic Empire. To make forever free all beings in the galaxy. To these ends, we pledge our property, our honor, and our lives."

- Declaration of Rebellion

The Alliance to Restore the Republic, commonly known as the Rebel Alliance, Alliance, the Rebellion, the Resistance, and rarely the Separatists, was a resistance movement formed by Bail Organa and Mon Mothma to oppose the reign of the Galactic Empire. The Alliance was formed from a less organized movement to oppose the Empire that existed, which was secretly led by Organa and Spartan-II Kelly-087. This early group came together from a series of rebel cells, including the crew of the Ghost and the Phoenix Cell. The Swords of Sanghelios, one of the many Covenant remnants led by Arbiter Thel 'Vadam, was one of the first cells to join what Mothma began calling "the Alliance," before the formal formation of the Alliance to Restore the Republic. The Alliance was publicly and formally declared with the Declaration of the Rebel Alliance and the document of the Declaration of Rebellion.

Source

 * https://starwars.fandom.com/wiki/Alliance_to_Restore_the_Republic