By Frederick Webb Hodge in 1906
A Siouan tribe of the northwest, the name Mandan is believed to be a corruption of the Dakota Mawatani. Previous to the time white settlers discovered the Indians, they called themselves simply “Numakiki,” meaning “people” or “people on the bank.” Their relations, so far as known historically and traditionally, have been most intimate with the Hidatsa; yet, judged by the linguistic test, their relationship may be nearer the Winnebago.
The Mandan traditions regarding their early history are scant and almost entirely mythological. All that can be gathered from them is the indication that, at some time they lived in a more easterly locality in the vicinity of a lake. This tradition, often repeated by subsequent authors, is given by Lewis and Clark, as follows:
“The whole nation resided in one large village underground near a subterraneous lake; a grapevine extended its roots down to their habitation and gave them a view of the light; some of the most adventurous climbed up the vine and were delighted with the sight of the earth, which they found covered with buffalo and rich with every kind of fruits; returning with the grapes they had gathered, their countrymen were so pleased with the taste of there that the whole nation resolved to leave their dull residence for the charms of the upper region; men, women, and children ascended by means of the vine; but when about half the nation had reached the surface of the earth, a corpulent woman who was clambering up the vine broke it with her weight, and closed upon herself and the rest of the nation the light of the sun. Those who were left on earth made a village below, where we saw the nine villages; and where the Mandan die they expect to return to the original seats of their forefathers, the good reaching the ancient village by means of the lake, which the burden of the sins of the wicked will not enable them to cross.”
The Mandan affirm that they descended originally from the more eastern nations, near the sea coast. Due to their linguistic relation to the Winnebago and the fact that their movements in their historic era have been westward up the Missouri River, correspond with their tradition of a more easterly origin, and would seemingly locate them in the vicinity of the upper lakes. It is possible that the tradition which has long prevailed in the region of northwest Wisconsin regarding the so-called “ground-house Indians” who once lived in that section and dwelt in circular earth lodges, partly underground, applies to the people of this tribe, although other tribes of this general region formerly lived in houses of this character. Assuming that the Mandan formerly resided in the vicinity of the upper Mississippi, it is probable that they moved down this stream for some distance before passing to the Missouri River.
The fact that when first encountered by the whites they relied to some extent on agriculture as a means of subsistence would seem to justify the conclusion that they were at some time in the past in a section where agriculture was practiced. It is possible that they learned agriculture from the Hidatsa, but the reverse has more often been maintained.
Some theorize that they formerly lived in Ohio and built mounds before migrating to the northwest. The traditions regarding their immigrations commence with their arrival at the Missouri River, first reached at the mouth of White River in South Dakota.
From this point they moved up the Missouri to Moreau River, where they came in contact with the Cheyenne, and where also the formation of “bands or unions” began. They then continued up the Missouri River to the Heart River in North Dakota where they were residing at the time of the first known visit of the whites. However, it is probable that trappers and traders visited them earlier.
The first recorded visit to the Mandan was that by the Sieur de la Verendrye in 1738. About 1750 the Mandan were settled near the mouth of Heart River in nine villages, two on the east and seven on the west side. Remains of these villages were found by Lewis and Clark in 1804. Having suffered severely from smallpox and the attacks of the Assiniboin and Dakota, the inhabitants of the two eastern villages consolidated and moved up the Missouri River to a point opposite the Mandan. The same causes soon reduced the other villages to five whose inhabitants subsequently joined those in the Mandan entry, forming two villages, which in 1776 were likewise merged. Thus the whole tribe was reduced to two villages, Metutanke and Ruptari, situated about four miles below the month of Knife River, on opposite sides of the Missouri River. These two villages were almost destroyed by smallpox in 1837, with only about 31 souls out of 1,600, according to one account, being left. However, other and probably more reliable counts make the number of survivors from 125 to 145. After that time they occupied a single village. In 1845, when the Hidatsa removed from the Knife River, some the Mandan went with them, and others flowed at intervals. Others moved up to the village at Berthold as late as 1858.
By a treaty made on July 30, 1825, the Mandan entered into peaceable relations with the United States. They participated in the Laramie, Wyoming treaty of September 17, 1851, by which the boundaries of the northwest were defined. They also participated in the un-ratified treaty of Fort Berthold, Dakota on July 27, 1866. By an Executive Order on April 12, 1870, a large reservation was set apart for the Mandan, Hidatsa, and Alandan Indians in North Dakota and Montana, along the Missouri and Little Missouri Rivers, which included the Mandan village, then situated on the left bank of the Missouri River.