The USS Tian An Men (NCC-21382) was a 23rd century Federation starship, a Miranda-class cruiser in Starfleet service in the 23rd and 24th centuries. In particular, the Tian An Men was outfitted for duty as a medium cruiser. (ST reference: Star Trek Encyclopedia, Decipher RPG module: Starfleet Operations Manual)
This ship was used in the elite Klingon Command Academy bridge crew training simulations for the Class of 2290. As such, a simulacrum of Tian An Men was encountered in the Piachi star system in a simulated mission. (TOS video game: Klingon Academy)
- This appearance has a slight mis-spelling of the canon name, USS Tian Nan Man.
In 2368, the Tian An Men was part of a 17-strong task force that was assigned to blockade the Klingon-Romulan border in order to stop Romulan interference in the Klingon Civil War. (TNG episode: "Redemption, Part II")
In late 2373, the Tian An Men was patrolling the Cardassian border, when it went missing near Minos Korva. Starfleet Command believed it had been destroyed by the Dominion, as many other ships had in the previous weeks. However, the Tian An Men was later recovered. (DS9 episode: "In the Cards"; ST reference: Star Charts)
In late 2374, the Tian An Men participated in the First Battle of Chin'toka. During the battle, the Tian An Men assisted the USS Defiant, USS Hood, and USS Nautilus in destroying a moon that contained the power generators for the Cardassian weapon platforms in the system. (DS9 episode: "Tears of the Prophets")
The ebook The Dominion War Sourcebook: The Fires of Armageddon, published by Last Unicorn Games after they had lost their Star Trek license, states an alternate registry of NCC-68022 for the USS Tian An Men.