In the year 5 BBY, a violent uprising took place in the Atrivis sector. This armed rebellion in the Atrivis sector involved the Liberators, who successfully seized the Imperial base on Mantooine, known as the Mantooine garrison. However, their victory was short-lived, as the Imperial Navy launched a rapid counter-offensive, resulting in the Liberators' defeat on Mantooine. Simultaneously, the Atrivis Resistance Group was operating in the area, and following careful consideration, they decided to align themselves with the Alliance to Restore the Republic.