Clearly, Oğuric-speaking tribes must have been in the Mongolia·Manchurian borderlands before the fifth century, and the Oğuric - Common Turkic division must have taken place by then. These correspondences constitute further evidence that the early Turkic-speaking community, before its various migrations, was located in the east, near Mongolic speakers.
These Oğuric groupings represent some of the earliest Turkic peoples about whom we have some knowledge. None of them bore the ethnonym Türk. The Oğuric homeland is clearly in the east. Indeed, the Byzantine source Priskos (b. 410?, 420?, d. post 472) reports that the migration of Oğuric tribes to the Pontic steppes, where they came into the purview of Constantinople, began in Inner Asia, touched off by the expansionist activities of the Avars, ca. 450.54. Immediately prior to that, Oğuric tribes appear to have lived in the Kazakh steppe and Western Siberia, having come there from points further east - perhaps in late Xiongnu times. They may have already at that time been in contact with Ugrian peoples.
At the time of their migrations, the Oğuric groupings appear to have been part of a larger, loose and still ill-defined confederation of nomadic tribes extending in an arc across Eurasia from Southern Siberia and Northern Mongolia to the Western Eurasian steppes.
The discovery of elaborate nomadic burials at Pazyryk in the Altai Mountains in the 1930s and later at Arzhan in the Tuva region gave new focus to the debate, and it has been conventional in the Russian literature to describe all these cultures as Scythian and to divide the time span covered into three phases: a pre-Scythian and initial Scythian period dating from the ninth to mid-seventh century; an early Scythian period from the mid-seventh to the end of the sixth-century; and a classical Scythian period covering the fifth to the third century.
The first phase, which can be more conveniently called the formative stage, includes the Tagar culture of the Altai-Sayan region and the two burials at Arzhan, which, as we have seen, are the result of local developments from the indigenous Karasuk culture. It was in this region that horse-riding nomadism developed, associated with archery and Scytho-Siberian art styles. Since this distinctive package does not appear in the Pontic steppe until the late eight century, a logical interpretation would be to argue that "Scythian" culture originated in the Altai-Sayan in the ninth-century and spread westwards, reaching Pontic steppe during the next century. If this is scenario is correct -- and it broadly conforms to the views of Herodotus -- then we have to accommodate the fact that predatory normadism, practised by the Cimmerians, may already have been under way in the Pontic region, possibly even as early as the ninth century, before the Scythians arrived.