what is the name of a Small, organized, dissenting group within larger one. Something that you have allegiance to?

Faction

Explanation:

A faction is a small group within a larger organization that dissents from the opinion of the majority. Factions are usually found in a political context, most commonly as a division of a political party. However, these can be formed within any organization. The concept of factions was an important one in the early years of the United States, and James Madison wrote about the dangers of factions in No. 10 of The Federalist Papers.

Faction

Explanation:

A faction consists of a group that is part of a larger group, in particular, one that has different ideas from it, and to which its supporters have allegiance. The most common types of factions are the political ones, such as political parties, trade unions, and any other organization with political interests.