The USS Armstrong (NCC-57537) was a Challenger-class Federation starship in service in the late 24th century.
During the brief Federation-Klingon War in 2373, the Armstrong was ambushed by Klingon forces and was severely damaged before escaping to Deep Space Nine. (DS9: "Apocalypse Rising")
The ship is most likely named after Neil Armstong who set foot on the Moon in 1969.