Second Perso-Turkic War

In 606/607, the Turks invaded eastern Persia with a large number of men, but were defeated in the first battle near the fort of Tus in Khorasan by a force of 2,000 Aswaran (elite heavy cavalry). Having lost this battle, the Turks and Hephthalites requested reinforcements from the Khagan. According to Sebeos, 300,000 troops were sent to reinforce the invading army. (An exaggerated claim from a medieval source. According to the Turkish historian Ahmet Tasagil the entire Turkic population at that time was not equal to one single Chinese province.[3] As nomadic people, agriculture was foreign to the Göktürks. Therefore, they had no the means to support such a large force.)

This force soon overran Khorasan as well as the fort of Tus with its 300 defenders under prince Datoyean. However, the Turks withdrew after their raids, which went as far as Isfahan. Smbat quickly reorganized the eastern Persian forces and finally crushed the Turks and Hephthalites, reportedly killing their leader in hand-to-hand combat (mard o mard).[4]

After the death of their leader, which shattered troop morale, the Turks and Hephthalites retreated in a disorderly manner. The Aswaran pursued them, routed them and killed many.

• Pourshariati, Parvaneh (2008). Decline and Fall of the Sasanian Empire: The Sasanian-Parthian Confederacy and the Arab Conquest of Iran. London and New York: I.B. Tauris. ISBN 978-1-84511-645-3.

• First Perso-Turkic War
• Third Perso-Turkic War