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.