During the brief Federation-Klingon War, the Armstrong and the USS Drake were ambushed by a Klingon battle group in early 2373 and both ships suffered heavy casualties before escaping to Deep Space 9. (DS9: "Apocalypse Rising")
Background information Edit
According to the first two issues of the Malibu Comics Deep Space Nine comics "Stowaway" and "Stowaway, Part II", the ship was an Oberth-class scout ship with a registry of NCC-19212 under Captain Johnson. Dr. Josiah Wembley, a renowned Federation xenobiologist was a member of her crew on their most recent mission to the Gamma Quadrant in mid-2369.