Before 2198 and his promotion to commanding officer by the elders of the Brotherhood, he served under the command of Simon Barnaky until Barnaky was captured in St. Louis. Dekker claims that Barnaky was a fine general, one of the best, and he had been honored to serve under his command.
Unlike his predecessor, who looks down on tribals and initially treated the Warrior with disdain, Dekker accepts anyone who fights for the Midwestern Brotherhood regardless of their background. He has a romantic relationship with Paladin Klotz who works undercover in Cold Water to gather information on raider activity.
"This is war, brother, and war is hell. But take heart - while they will die a delirious, vomiting death, they will do so to help restore civilization from the ashes. Not everyone in the wasteland would be so lucky." - Referring to the treatment of POWs.