There exist groups of mutants worldwide that do not fall into the category of the X-Men or the Brotherhood of Mutants. These groups, while smaller and generally less organized, do on occasion come into contact with either of the two larger factions. Some mutants see both sides and simply choose to not get involved or to stay away from them. Even some former members of the X-Men or Brotherhood that left their teams for personal reasons still pop up here and there, or try to keep an eye on their old allies.