Note 98 — Chapter V · The Rise of Islām and Invasions of the Arabs
Reading edition
This warrior held command of the Arab troops in Central Asia under several viceroys in succession, and thus gained the confidence of his troops and an intimate knowledge of Khorāsān and the adjoining tracts. The stability in the office of generalissimo went far to neutralise any disadvantages occurring from the frequent changes in that of viceroy.