The Tritsus appear to have been settled somewhere to the east of the Parushni, on the left bank of which Sudas may be supposed to have drawn up his forces to resist the coalition of the ten kings attempting to cross the stream from the west. Five tribes, whose names do not occur later, are mentioned as allied with Sudas in the great battle. The Srinjayas were probably also confederates of the Tritsus, being, like the latter, described as enemies of the Turvaças. Of some tribes we learn nothing from the Rigveda but the name, which, however, survives till later times. Thus the Uçinaras, mentioned only once, were, at the period when the Aitareya Brahmana was composed, located in the middle of Northern India; and the Chedis, also referred to only once, are found in the epic age settled in Magadha (Southern Behar). Krivi, as a tribal name connected with the Indus and Asikni, points to the north-west. In the Çatapatha Brahmana it is stated to be the old name of the Panchalas, who inhabited the country to the north of the modern Delhi. The Atharva-veda mentions as remote tribes not only the Gandharis and Mujavats, but also the Magadhas (Behar) and the Angas (Bengal). We may therefore conclude that by the time that Veda was completed the Aryans had already spread to the Delta of the Ganges. The Panchalas are not mentioned in either Veda, and the name of the Kurus is only found there indirectly in two or three compounds or derivatives. They are first referred to in the White Yajurveda; yet they are the two most prominent peoples of the Brahmana period. On the other hand, the names of a number of the most important of the Rigvedic tribes, such as the Purus, Turvaças, Yadus, Tritsus, and others, have entirely or practically disappeared from the Brahmanas. Even the Bharatas, though held in high regard by the composers of the Brahmanas, and set up by them as models of correct conduct, appear to have ceased to represent a political entity, for there are no longer any references to them in that sense, as to other peoples of the day. Their name, moreover, does not occur in the tribal enumerations of the Aitareya Brahmana and of Manu, while it is practically altogether ignored in the Buddhistic literature. Such being the case, it is natural to suppose that the numerous Vedic tribes, under the altered conditions of life in vast plains, coalesced into nations with new names. Thus the Bharatas, to whom belonged the royal race of the Kurus in the epic, and from whom the very name of the Mahabharata, which describes the great war of the Kurus, is derived, were doubtless absorbed in what came to be called the Kuru nation. In the genealogical system of the Mahabharata the Purus are brought into close connection with the Kurus. This is probably an indication that they too had amalgamated with the latter people. It is not unlikely that the Tritsus, whose name disappears after the Rigveda, also furnished one of the elements of the Kuru nation.