Alpha Beta Quadrant Overview star chart

Alpha/Beta Quadrant Overview

Tomed was a location set in the Beta Quadrant.

In 2256, its' location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the USS Discovery. (DIS: "Magic to Make the Sanest Man Go Mad")

In 2257, during the first Federation-Klingon War, this location was occupied by the Klingons. (DIS: "The War Without, The War Within")

This location was only mentioned in writing.
The Tomed mission and/or the Tomed Incident might be connected to this location.
According to Star Trek: Star Charts (p. 62) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Tomed was an M-class star, indicated to be the site of a historical battle.