Like many Americans, I first learned about George Custer and the Battle of the Little Bighorn not in school but at the movies. For me, a child of the Vietnam War era, Custer was the deranged maniac of Little Big Man. For those of my parents’ generation, who grew up during World War II, Custer was the noble hero played by Errol Flynn in They Died with Their Boots On. In both instances, Custer was more of a cultural lightning rod than a historical figure, an icon instead of a man.