[TSOPA] Tycho Station OPA

The Outer Planets Alliance (OPA) is a loosely affiliated network borrowing or associating under a core common ideology that started its life as a labor union or advocacy group, fighting for the interests of inhabitants of the Belt, often in direct conflict with the inner planets' Earth-Mars Coalition Navy

The OPA is described as either a sociopolitical movement, according to people sympathizing with Belters, or a terrorist network, according to the inner planets. Because of its decentralized structure and the range of activities by groups claiming affiliation, both descriptions have more than a little basis in fact. The statement that it's decentralized negates the assertion that it has a headquarters.