From Star Trek: Theurgy Wiki
The USS Lexington (NCC-30405) was a 24th century Federation Nebula-class starship operated by Starfleet. It had been active in the Alpha Quadrant in the 2360's and 2370's.
After graduating from Starfleet Academy 2369, Security Officer Adam Kingston served aboard the Lexington for nine years. He had a rather eventful career though it has been noted on his file that there have been a number of accusations of borderline behavior, especially toward enemies in the field. This resulted in a number of demerits against him. He was passed over for promotions because of it, only promoted to Junior Lieutenant shortly before his transfer to the USS Crazy Horse in 2378.
Crewman Mickayla MacGregor served aboard the Lexington from 2369 to 2371. In 2372, she transferred to the recently commissioned USS Enterprise-E.
Then Junior Lieutenant Natalie Stark was stationed to the Lexington from 2377 to 2379, as an Optical Data Network (ODN) Specialist, and in her spare time worked on a Masters of Engineering in the field of Artificial Intelligence, under the tutelage of the ships Chief Engineer. The subject was a continuation of her studies at the Academy, an interest grown out of having roomed with an Android Cadet, Vanya.
In 2373, the Lexington fought against the second Borg invasion at the Battle of Sector 001. After the initial contact with the cube, the Lexington’s first casualty report listed 96 dead, and 22 wounded. (Star Trek: First Contact) (Source: Memory Alpha)