Separatist holdouts were military and political segments of the Confederacy of Independent Systems who continued to exist after the end of the Clone Wars, and were sought out by the Galactic Empire, the successor of the Galactic Republic. These holdouts were either doubtful the veracity of the end of the war, loyal to the Separatist cause or were not aware that the fighting had even ended.
In the aftermath of the Clone Wars, the Imperial Military viewed separatist holdouts as a major threat and would send the navy on a series of campaigns in the Western Reaches, where a number of holdouts were openly resisting Imperial authority.
During the rebellion, a garrison on Agamar helped a cell of rebels against the Empire.
Separatist holdouts were the remnants of the Confederacy of Independent Systems. The political crisis between the Galactic Republic and the Confederacy culminated in the Clone Wars, a galaxy-wide conflict that the latter ultimately lost, yet also allowed the Galactic Empire to rise in place of the Republic. Although the war’s conclusion marked the end of the Separatist cause, the remnants of the Confederacy would endure for years, hiding from the New Order in several locations such as the planet Agamar or in the Western Reaches. These holdouts varied from groups of pro-Separatist sentients to battle droids that did not follow the shutdown command at the end of the Clone Wars, which could be mostly independent and disconnected from each other.