In 2270, the Halcyon was destroyed after becoming trapped in an interdimensional rift, which nearly also claimed the USS Enterprise when Enterprise arrived to determine the Halcyon's fate. (TOS short story: "Intersection Point") The Halcyon is the only vessel known to belong to the Avenger-class in Star Trek literature. Some fan fiction sources have associated Avenger-class vessels as a variation of the Miranda-class, but no licensed sources have ever referenced such details about the ships' design.