Bright Liberation Movement
The Bright Liberation Movement possessed a checkered past in its previous incarnation.
Back when the Bentheim Liberation Movement fought for the independence of the state's only port system, it had largely been regarded as a band of terrorists.
The BLM never managed to gain traction across much of the population because few people thought it was a good idea to separate Bentheim from the Bright Republic.
If the port system and possibly a number of surrounding star systems declared independence, then the neighboring Vesia Kingdom would just swoop in and swallow up the much more vulnerable port system in an instant!
However, the one good thing about the Bentheim Liberation Movement was that its deplorable actions at least restrained the actions of the central government.