The USS Aeolus (NCC-588) was a Hermes-class scouts on active duty in Starfleet during the 23rd century. (Star Fleet Technical Manual) From 2271 to 2273 the Aeolus was assigned to patrol duties along the Romulan Neutral Zone. In the following year the Aeolus was shifted to the Federation-Klingon border where it stayed for the next three years. (Ship Recognition Manual, Volume 4: Starships of the Original Series Era)