Wanting to escape the taxation under UCS rule a colonization effort was undertaken by a group called the Freehold. They hoped to fly far out into wild, uncharted space ahead of UCS contracted exploration teams. The planet became known as New Charon, and has since avoided the attention of the UCS, as they have little interest in exploring in that direction.
The militia is formed of volunteers, former military personnel, and other locals. Their equipment is fine, but nothing state of the art. Their CSMP walkers are leftovers from the First Independence War and are long since out of date. But they pack a punch and will cause pirates to have second thoughts.