The Freedom Faction was one of the two factions fighting in the Q Civil War. They opposed what they described as the forces of the status quo.
They emerged after the suicide of Quinn, as his calls for freedom and individualism continued to echo in the ears of those who believed in his teachings. Q was considered their ringleader.
In a rendering of the war made perceivable to Humans, they appeared as the Union Army of the American Civil War. (VOY: "The Q and the Grey")