general outline of their history:

Almost the whole of that vast tract of country comprised between the
Mississippi, the Red River of Lake Winnepeg, the Saskaskawan, and the
Missouri, is loosely occupied by a great nation whose primitive name is
Darcota, but who are called Sioux by the French, Sues by the English.
Their original seats were on the Mississippi, but they have gradually
spread themselves abroad and become subdivided into numerous tribes. Of
these, what may be considered as the Darcotas are the Mindawarcarton, or
Minowakanton, known to the French by the name of the Gens du Lac, or
People of the Lake. Their residence is on both sides of the Mississippi
near the falls of St. Anthony, and the probable number of their warriors
about three hundred. Above them, on the river St. Peter's, is the
Wahpatone, a smaller band of nearly two hundred men; and still farther
up the same river below Yellow-wood river are the Wahpatootas or Gens de
Feuilles, an inferior band of not more than one hundred men; while the
sources of the St. Peter's are occupied by the Sisatoones, a band
consisting of about two hundred warriors.

These bands rarely if ever approach the Missouri, which is occupied by
their kinsmen the Yanktons and the Tetons. The Yanktons are of two
tribes, those of the plains, or rather of the north, a wandering race of
about five hundred men, who roam over the plains at the heads of the
Jacques, the Sioux, and the Red river; and those of the south, who
possess the country between the Jacques and Sioux rivers and the
Desmoine. But the bands of Sioux most known on the Missouri are the
Tetons. The first who are met on ascending the Missouri is the tribe
called by the French the Tetons of the Boise Brule or Burntwood, who
reside on both sides of the Missouri, about White and Teton rivers, and
number two hundred warriors. Above them on the Missouri are the Teton
Okandandas, a band of one hundred and fifty men living below the
Chayenne river, between which and the Wetarhoo river is a third band,
called Teton Minnakenozzo, of nearly two hundred and fifty men; and
below the Warreconne is the fourth and last tribe of Tetons of about
three hundred men, and called Teton Saone. Northward of these, between
the Assiniboin and the Missouri, are two bands of Assiniboins, one on
Mouse river of about two hundred men, and called Assiniboin Menatopa;
the other, residing on both sides of White river, called by the French
Gens de Feuil