The USS Marsh (NCC-73947) was a Matatoa-class starship of the Federation Starfleet. Yh'ahni was stationed aboard the Marsh in 2372. The Marsh received a distress call in 2371 or 2372 from a Trookanian colony. When they arrived, they discovered an orbital attack destroyed half the colony, severely injuring the survivors. In mid-2372, the Myhr'an destroyed the Marsh as well as the USS Ruapehu and Starbase Expanse 4. (Star Trek: The Cantabrian Expeditions: "Catalyst, Part One")