Born Robert Leroy Parker (Butch Cassidy) and Harry Alonzo Longabaugh (Sundance Kid) respectively, the pair were founding members of The Wild Bunch, a notorious gang of American outlaws considered to be some of the most successful train robbers of all time. Their practice of splitting up after robberies and keeping a network of hideouts and contacts among various ranches made them so difficult to catch that the Union Pacific Railroad considered negotiating for their amnesty if they ceased their activity. The Wild Bunch robbed another train instead. Although no strangers to killing, The Wild Bunch wasn’t known as a particularly murderous gang, with Butch and Sundance being potentially two of the least violent members. Like many outlaws, they preferred to use intimidation to get what they wanted. Butch and Sundance’s deaths are the subject of great controversy. After blowing their chance at amnesty, the two fled from the Pinkertons to various parts of South America, eventually ending up in Bolivia. Around that period, two bandits died in a shootout with the military after stealing from a local mining company. They are believed to be Butch and Sundance, but this has yet to be confirmed.
Many suspect that Butch and Sundance survived the shootout and moved back to America. This has sent them down in outlaw legends along side Billy the Kid and Jessie James. Since then Butch and Sundance have appeared throughout pop culture from the 1969 western film Butch Cassidy and the Sundance Kid starring Paul Newman and Robert Redford, to the 2016 anime Drifters.