The rich oasis, known as Meru or Merv, the ancient Margiana, is especially mentioned as overrun by his troops, which are said by some to have crossed the Elburz range into Khorassan and to have proceeded westward as far as Kei, or Rhages.

When news of the invasion reached the Persian court, the alarm felt was great; Varahran was pressed to assemble his forces at once and encounter the unknown enemy; he, however, professed complete indifference, said that the Almighty would preserve the empire, and that, for his own part, he was going to hunt in Azerbijan, or Media Atropatene.

During his absence the government could be conducted by Narses, his brother.

All Persia was now thrown into consternation; Varahran was believed to have lost his senses; and it was thought that the only prudent course was to despatch an embassy to the Khacan, and make an arrangement with him by which Persia should acknowledge his suzerainty and consent to pay him a tribute.

Ambassadors accordingly were sent; and the invaders, satisfied with the offer of submission, remained in the position which they had taken up, waiting for the tribute, and keeping slack guard, since they considered that they had nothing to fear.