Apparently the Native Americans and the western settlers moving along the Oregon Trail in the mid-19th century got along quite well.
The amicable relations came to an abrupt end in 1855:
- In 1855, a detachment of six hundred U.S. Army soldiers commanded by General William S. Harney surrounded a band of Brule Sioux led by Chief Little Thunder near Blue Water Creek, six miles north of Ash Hollow, slaughtering eighty-six braves and capturing most of their women and children. Harney’s expedition was launched in retaliation for an incident the year before, when an inexperienced Army lieutenant, John Grattan, had brashly marched his soldiers into a large Brule Sioux camp outside Fort Laramie, Wyoming, demanding that the chiefs produce the Indian who had shot a Mormon pioneer’s cow, even though the Brules had already offered restitution for the cow by giving the pioneer his pick of their sixty-horse herd. The usual army bumbling was involved. Grattan was a recent West Point graduate, unfamiliar with Sioux ways, and his French-Canadian “interpreter” could not speak the Brule dialect and was drunk.
— The Oregon Trail: A New American Journey, p. 213