Salva II was the second planet of the Salva system, located between the Federation and the Cardassian Union. Salva II was a Federation colony until the Federation-Cardassian Treaty of 2370, when it was turned over to the Cardassians. Most of the displaced colonists relocated to planet Marva IV. (DS9 episode: "For the Uniform") The system was left largely uninhabited by the Cardassians, and thus was used as an occasional Maquis base. (TNG - Slings and Arrows eBook: A Weary Life)