The Starfleet 20th Fleet was a military unit, a fleet group of the Federation Starfleet.
History[]
In the late 24th century, the 20th Fleet was a mobile fleet, exploring sectors along Federation borders in the direction of the galaxy's rim.
By the 2370s, this fleet consisted of a number of scouts of the Oberth-class to give the science tasks of exploration sufficient sensor support. The remainder was filled out with a number of newer of Akira and Steamrunner-class vessels. (Decipher RPG module: Starfleet Operations Manual)