The Fetterman Massacre was the single most bloodiest attack by the Sioux tribe. Army men were on duty on a fort on the Bozeman Trail, used by miners to reach the gold mines in Montana. A Sioux military leader, Crazy Horse, acted as bait to lure troops into their trap. He tricked the fort's commander into sending a group of about 80 soldiers to pursuit. Hundreds of warriors were waiting in ambush and wiped out the entire group of 80. The incident is known by the name of the Fetterman Massacre.