Mostly women & children, who were suffering from smallpox. The US army fired wildly into the village, then burned the village down & threw bodies of the dead into the fire.
The Blackfoot camp was unprotected as most of the men were out hunting. Those who survived were forced to march to Fort Benton, 90 miles away, without horses, adequate food, and clothing; many of them froze to death in the subzero weather.
The atrocity was led by Major Eugene Baker, a known drunk, who was informed the band he was about to open fire on was peaceful & not who he was after, but said, “That makes no difference, one band or another of them; they are all Piegans [Blackfeet] and we will attack them.”
Upon hearing the approaching cavalry, Chief Heavy Runner ran toward the soldiers shouting and waving a piece of paper showing the band had a safe conduct paper from the Indian Bureau. But he was immediately shot, starting the massacre.