Chimsa is a system in the Cimaron Region of the Peco Arm of the Milky Way Galaxy.
Its primary planet is also named Chimsa. It is controlled by the elSha race.
From the Books: "It was out of desperation that the operation was finally moved to the world of Chimsa. It wasn’t a far-flung and remote processing operation of the Wathayat. Chimsa was a heavily-populated planet of the elSha. A technology center that supplied goods all over the Union. Attacking Chimsa would be an act of borderline insanity." - Cartwright's Cavaliers, p. 154.