11. The Pinkertons vs. Butch Cassidy’s Wild Bunch
Butch Cassidy’s Wild Bunch, with the Sundance Kid, became one of the Pinkertons’ most elusive adversaries. The agency deployed advanced surveillance along rail lines and relied on a network of informants to intercept the gang’s movements. As HistoryNet recounts, this cat-and-mouse game tested the limits of both lawmen and outlaws in the fading days of the Wild West.
