- Rhinessa IV
In 2372, the USS Cantabrian followed Yh'ahni and the trader Wenloth to the Rhinessa system to free Starfleet officers and Federation civilians being held by the Myhr'an at the internment camp on the planet's surface. The Cantabrian was successful in rescuing the majority, and, with the USS Aotearoa, destroyed one Myhr'an battle cruiser and the internment camp as well as severely damaging two other Myhr'an battle cruisers, before they fled the system. (Star Trek: The Cantabrian Expeditions: "Two Hit, One Stone")
Under Myhr'an control as of 2372.