The term, Neutral Faction Group (NFG), refers to factions created or existing prior to Year 2 Day 126.
In the early years of the Star Wars Combine, only the Galactic Empire, the Rebel Alliance, Black Sun and the Bounty Hunter Alliance were permitted to be the primary factions in the simulation. All other organizations were categorized as "Neutral Faction Groups" (NFGs).
On Year 2 Day 126, the system of Neutral Faction Groups (NFGs) was replaced by Combine Member Groups (CMGs). With the release of the Darkness interface in December 2003, the phrase "Combine Member Groups" was phased out and, thereafter, all organizations were equally referred to as factions.