Today marks the 142nd anniversary of one of the most famous battles in history. On June 25, 1876, the Battle of the Little Bighorn began in southeast Montana. And while for Crazy Horse and his Lakota it would be their most significant victory ever over the U.S. Army during the Indian Wars, it was really the beginning of the end for the Lakota leader and his people. 

Crazy Horse would surrender almost a year later, and he would be dead after only one anniversary of the battle. Sitting Bull, who was also at the Little Bighorn, would retreat to Canada and eventually he too, like Crazy Horse, would die on the reservation. 

Below, Crazy Horse biographer Kingsley Bray explains the role that the Lakota war chief played in one of the most talked about and studied battles of all-time.