Bregan D'aerthe is a drow mercenary band based in the drow stronghold of Menzoberranzan and appears in many R. A. Salvatore novels. Founded by Jarlaxle Baenre as a means for houseless rogues to survive in Menzoberranzan, the group has thrived and expanded greatly since its inception. Due to its array of skilled soldiers and its many connections with the outside world, Bregan D'aerthe is a valued ally of many powerful drow houses. More than once in various novels, it has been remarked that Jarlaxle is one of the most protected drow in the Underdark due to the competent soldiers he surrounds himself with. This band of societal malcontents consists of approximately 150 members (though at times known to employ many more, having nearly one thousand agents at work with the Calimport initiative), mainly houseless males. Bregan D'aerthe has been very influential in the chaotic happenings of Menzoberranzan and has connections with Blingdenstone and has agents in Ched Nasad as well as major cities on the surface, most notably Luskan, Waterdeep, Calimport, and Heliogabalus. It was led by Jarlaxle Baenre, up until Servant of the Shard and is currently led by the drow psionicist Kimmuriel Oblodra.
"...no house desired conflict with Bregan D’aerthe. It was the most secretive of bands, few in the city could even guess at the numbers in the group, and its bases were tucked away in the many nooks and crannies of the wide cavern. The company’s reputation was widespread, though, tolerated by the ruling houses, and most in the city would name Jarlaxle among the most powerful of Menzoberranzan’s males." - Starless Night
"...in Menzoberranzan, Jarlaxle and his spying network, Bregan D’aerthe, had no equal." - Starless Night
Read more about this topic: Menzoberranzan