It were Blackfoot Indians that camped with Meriweather Lewis and a few of his men in the Marias River area NW of Great Falls, Montana. (William Clark had left the group, following their westbound trail back to the Yellowstone River.) Their goal was to steal whatever they could, including the state of the art flintlock rifles that Lewis had. In the ensueing skirmish, two Indians were killed, the only Indians killed during the two year Corps of Discovery, although some close calls occurred elsewhere.
Blackfoot Indians used serviceberry and mountain maple for bows. Lewis broke up some the Indians' bows and arrows and burned them in their campfire before skedattling out of there.
A canyon near my home is Hellgate Canyon where Blackfeet attacked other tribes crossing over the Divide to hunt bison.