The primary headquarters for the Alliance to Restore the Republic was situated on the planet Brigia, this occurred after the Rebel departure from Chrellis Base. As early as 1 BBY, the Rebels were already formulating plans for another relocation. This was prompted by intelligence indicating that the Galactic Empire intended to attack the base. This assault was designed as the initial phase of a larger offensive known as Operation Strike Fear. Consequently, the Alliance promptly evacuated the Brigia base, moving their operations to Orion IV.