The Williamson gang is a group of outlaws led by Bill Williamson, featured in Red Dead Redemption. They serve as the main antagonistic faction of the game's New Austin chapter. After the disbandment of the Van der Linde gang, whereof he was a member, Bill Williamson went on to establish his own gang at some point between 1907 and 1911. The gang eventually rose to prominence in New Austin, gaining a reputation as the most dangerous gang left in the West. Williamson and his gang took over Fort Mercer in Río Bravo, the former domain of the Del Lobo Gang.