Bighorn River Wind River Canyon near the town of Thermopolis. From there, the river flows through the Bighorn Basin in north central Wyoming, passing through Thermopolis and Hot Springs State Park. At the border with Montana, the river turns northeast, and flows past the north end of the Bighorn Mountains, through the Crow Indian Reservation, where the Yellowtail Dam forms the Bighorn Lake reservoir. The reservoir and the surrounding canyon are part of the Bighorn Canyon National Recreation Area. The Little Bighorn River joins the Bighorn near the town of Hardin, Montana. Approximately fifty miles farther downriver, the Bighorn River ends where
Battle of the Little Bighorn forces, though not equally matched in the number and type of arms, were comparably outfitted, and neither side held a overwhelming advantage in weaponry. Two hundred or more Lakota and Cheyenne combatants are known to have been armed with Henry, Winchester, or similar lever-action repeating rifles at the battle. Virtually every trooper in the 7th Cavalry fought with the single-shot, breech-loading Springfield carbine and the Colt revolver. Historians have asked whether the repeating rifles conferred a distinct advantage on Sitting Bull's villagers that contributed to their victory over Custer's carbine-armed soldiers. Historian Michael L. Lawson offers a scenario based on