Finally, Washakie's career gives additional evidence that there were no hard and fast lines between the so-called "Eastern Shoshone" and other Shoshone groups. Washakie's wanderings, according to Wilson, took him into Utah, Idaho, and Montana (E. N. Wilson, 1926, pp. 68-73). This was consistent with the general Shoshone pattern of visiting between areas for short or extended periods. The unique character of Washakie's leadership can best be explained in terms of contact with the whites and the Shoshones' need to expand into the buffalo grounds east of the Rocky Mountains. First, Washakie united and represented all those Shoshone who did not choose to join their fellows in northern Utah and southern Idaho in hostilities against the whites. Second, Washakie was an able and vigorous war leader under whom the embattled Shoshone could rally. Although at no time a separate, territorially distinct and exclusive group, the Eastern Shoshone evidently became somewhat differentiated from their people to the west by the latter's long distance from the shrinking buffalo grounds and by their distaste for the warlike activities of their Utah and Idaho fellows. The Eastern Shoshone, however, did not attempt to maintain the area over which they roamed to the exclusion of other Shoshone and of the Bannock. Their neighbors and colinguists to the west, if they were properly mounted, could and did join with them in buffalo hunting. III. THE SHOSHONE AND BANNOCK OF IDAHO The Shoshone of western Wyoming were a mobile population whose primary subsistence was provided by buffalo herds. The Shoshone of Idaho showed no such unity of ecological adaptation, for the region was inhabited by mounted buffalo hunters and by less prosperous Shoshone who fished and gathered wild vegetables for a livelihood. While the buffalo hunters tended to be located in the southeastern part of Idaho and the fishing and gathering peoples in the southwestern, the mounted hunters traveled throughout the southern part of the state and, at certain times of the year, mingled with the poorer, footgoing Indians.