Groups of Bannock were variously reported in Wyoming, Montana, and Idaho during these years, and it is to be assumed that they sought both buffalo and rations. Governor Campbell of Wyoming wrote in October, 1870, that the Bannock had spent the summer with the Crow Indians (J. A. Campbell, 1871, p. 639) after leaving Wind River. The Bannock were evidently the most difficult to settle of all the Idaho Indians, and their nomadic propensities were restrained only after the conclusion of the Bannock War of 1878. The data that follow were gathered through ethnographic means and continue and summarize the foregoing historical account.
The Bannock population of the Fort Hall plains was undoubtedly resident in that area for a considerable period. Living on the western slope of the Continental Divide, they crossed the mountains frequently to hunt in the buffalo country of the Missouri drainage. In the process they came into contact with tribes of the Plains and borrowed a good deal of culture from them. However, contact with the Paiute of Oregon continued. During the Bannock War of 1878 the Fort Hall insurgents were joined by the rebellious inmates of the Malheur Agency in eastern Oregon. Also, genealogies given by informants indicate that many Northern Paiute were still leaving their Oregon habitat as late as the time of the treaty and thereafter and were joining the Bannock in their more abundant and exciting life of warfare and buffalo hunting. In effect, these migrants became "Bannock" when they began to live with the Bannock. The formation of the Bannock in southeastern Idaho from Oregon Paiute who managed to get horses and were attracted by the buffalo hunt was not a single occurrence at some indefinite time in the past; it was a continuing process that lasted into the reservation period. There is no evidence placing the Bannock in the Fort Hall area before the introduction of the horse. It is doubtful that they predated this time, given the fact that buffalo hunting on horse was one of the main attractions of eastern Idaho.
The relation of the Bannock to neighboring Shoshone groups, denominated by the generic term, "Wihinait," is somewhat problematic and can best be understood from detailed consideration of the two populations. Steward says that "the Fort Hall Bannock and Shoshoni were probably comparatively well amalgamated into a band by 1840" (Steward, 1938, p. 202), but also notes (p. 10) that "Bannock and Shoshoni, though closely cooperating and living on terms of equality, were politically distinct in that each had its band chief." Our evidence indicates that there was a good deal of social intercourse and intermarriage and coöperation in the buffalo hunt between the two groups, but except when engaged in some joint endeavor each appears to have maintained its autonomy. Although there were organized bands, their lines were not very clear-cut because of their frequent fission (ibid., p. 202):
Even with the advantage of the horse, it was not always expedient for the combined Bannock-Shoshoni band to move as a unit. They frequently split into small subdivisions, each of which travelled independently through Southern Idaho to procure different foods, to trade, and occasionally to carry on warfare.
Despite the presence of many Plains Indian culture elements, the social structure of the Fort Hall people was basically that of the Shoshonean population of the Basin-Plateau. While they grouped into larger units for certain defined purposes, these units functioned only during part of the year. The internal organization of the bands was fluid, amorphous, and shifting.
The question of the constitution of the bands also remains: was there one large Fort Hall Shoshone and Bannock band, were there one Fort Hall Bannock and one Fort Hall Shoshone band, or were both populations split into smaller groups? Both Steward and Hoebel reject the first possibility, and the answer seems to lie somewhere between the second and third. Hoebel names four Bannock bands (1938, p. 412): Cottonwood Salmon Eaters, Deer Eaters, Squirrel Eaters, Plant (?) Eaters. One informant told us also of four food names among the Bannock. These were: Biviadzugarika ("root [?] eaters,") Topihabirika ("root [?] eaters"), Tohocharika ("deer eaters"), and Yaparika ("yamp eaters"). Only part of the Fort Hall Bannock population bore these names. The names did not refer to band groupings of any type, and their bearers were of various bands. Our informant did not know the origin of this nomenclature. It is possible that the names designated Oregon food areas and were applied to more recent migrants from the Oregon Paiute, but the names do not bear sufficiently close correspondence to those given by Blythe and Stewart to validate this assumption.
Bannock informants claimed that there was a head chief of all the Bannock, Tahgee, and that subchiefs under him were leaders of smaller groups at certain times of the year. The subchiefs were said to have attended the treaty conference at Fort Bridger with Tahgee. Their names were Patsagumudu Po'a, Kusagai, Totowa, Pagoit, and Tahee. Tahgee represented the Bannock in their affairs with the whites and was the leader of the buffalo hunt. Otherwise, he seems to have exerted little direct authority over his people, although he had great influence in council. Bannock informants all asserted that people went where they wished when they wished and did not necessarily travel under any form of leadership.
Bannock chieftainship was nonhereditary and was assigned by general agreement to a man noted for wisdom and courage.
Among the Shoshone of the Fort Hall region, leadership was more clearly a function of interaction with the whites. One man was said to have become chief "because he helped the whites." Two chiefs were reported, Aidamo and Aramun; the bands of both roamed through southeastern Idaho and into northern Utah. These Shoshone were called by the Bannock, "Winakwat," or "Wihinait" in Shoshone. The name evidently did not refer to a single band but designated all Shoshone-speaking people of the immediate area. I could find no confirmation of Hoebel's Elk Eaters, Groundhog Eaters, and Minnow Eaters, all of whom were said to live in the area roamed over by the various Fort Hall Shoshone and Bannock groups (Hoebel, 1938, pp. 410-413).
In the Fort Hall area, as in the rest of Idaho, winter habitat supplies the only stable criterion for identifying the several groups or populations. The Bannock customarily wintered on the Snake River bottoms above Idaho Falls and at the mouth of Henry's Fork near Rexburg, Idaho. They also wintered downstream in the vicinity of the modern town of Blackfoot, Idaho; historical sources mention Bannock winter camps at the mouth of the Portneuf River. The Snake River—Henry's Fork sites were favored because of the abundance of the mule-tailed deer, which came into the bottomlands in the winter. Another source of subsistence in winter was cottontail rabbits, which were caught among the willows in the bottoms with a noose snare or by surrounding them and killing them with the bow and arrow.