The Cambridge History of India, Vol. I: Ancient India v1.c24.226

v1.c24.226

It may be observed, moreover, that a number of the tribes who inhabited the Indo-Irānian borderland in the time of Darius (see above, pp. 327–8, 338) were represented in the host of Xerxes as well; namely the Bactrians, Sakai, Ar(e)ioi, Gandarioi, Dadikai, Kaspioi, Sarangai, Paktyes, occupying the Afghān region, and the Mykoi of Baluchistān (Hdt. VII, 64–68). On the whole, therefore, we may conclude that the eastern domain of the Persian Empire was much the same in its extent under Xerxes in 480 B.C. as it had been in the reign of his great father³.