The Chelsea System was a star system in the space of the Manticoran Alliance.
After the Third Battle of Yeltsin's Star, the system was captured by RMN forces under the command of Admiral White Haven. The system was marked on a strategic map as Manticoran Alliance territory. (HH3, HH4)
- ↑ According to White Haven, the system was captured with no shot fired, while his flag captain mentioned some battle having occured - which could be possible after the system was captured. (HH4)