Bryma is a planet in the Federation-Cardassian Demilitarized Zone. In the 2370s, Bryma was the site of a Cardassian colony, which the Maquis believed housed a weapons depot.
A Maquis cell led by Calvin Hudson planned to attack the colony in 2370, as they suspected it was a launching point for attacks against Federation colonies in the DMZ. Runabouts from Deep Space 9, under the command of Benjamin Sisko, prevented the attack. (DS9: "The Maquis, Part II")
In the Pendragon timeline, Bryma was attacked by the Klingons in 2372. The colony was obliterated. (Star Trek: Pendragon: "The Distant Fire")