Defender Sibley

Defender Sibley is a member of the Brotherhood of Steel Outcasts located at the Outcast Outpost in Bailey's Crossroads in the year 2277.

Effects of player actions
He takes the player to Olin and the Pod when he's told to do so, and once the player completes the Anchorage Reclamation simulation and opens the locked door to the armory, Sibley will attempt a coup d'etat with his men against Protector McGraw, feeling that the player doesn't deserve anything in the chamber.

Appearances
Defender Sibley only appears in the Operation: Anchorage add-on for Fallout 3.