The Cambridge History of India, Vol. I: Ancient India v1.c16.16

v1.c16.16

There seems, in any case, to be specific evidence for the supposition that by the fifteenth century B.C. tribes of Āryan stock held, or exercised influence over, a wide area extending from northern Asia Minor over north-west Babylonia to Media; and there seems to be nothing to prevent us assuming that even then, or soon after, the Āryans pushed their way still eastwards and northwards, mainly confining themselves to the territories south of the Oxus, but occasionally occupying lands between that river and the Jaxartes.