 SPOILER: The climatic gun battle at the end of the movie was  historically inaccurate. There were only a few police officers  present (the Bolivian town of San Vicente were Butch Cassidy and the  Sundance Kid were allegedly killed was a very small town back in  1911, and didnt have many police officers); plus, only a relatively  small number of Bolivian army cavalry troops actually took part in  the fight, not the hundreds shown in the film; the casualty count of  the Bolivian policemen was nowhere near as enormous as that shown in  the film. Also, most of the gunfight took place at night, not in  broad daylight as shown in the movie.