Ambassador was a Terran starship stationed at Menem, part of the second Terran diplomatic mission to Menem. It was the site of the Accord in Orbit and the Treaty of Union, which established the Union of Human Worlds. The ship served as the de facto Terran embassy at Menem until a diplomatic facility was built at Sovdu, following the treaty. Ambassador remained in orbit over Menem for nearly sixty years until it was landed on Menem's larger moon and used to establish the first lunar base. The ship has been decommissioned and now serves as museum documenting first contact experiences and dedicated to the cause of peace and equity on all Union worlds.