Though small, the Brotherhood has been an influential group in the history of the wasteland, first as a survivalist group, then a major research and development house, then finally as an enemy of the New California Republic, fighting a war against the New California Republic on the west coast. While the goals of the Brotherhood vary from chapter to chapter, they share a core mission centered on seizing and regulating pre-War technology throughout the wasteland. The Brotherhood has its roots in the United States Armed Forces, founded by a United States Army security team stationed at Mariposa Military Base before the Great War.