قتيبة بن مسلم الباهلي
As governor of Iraq and viceroy of the East, al-Hajjaj supervised a major wave of expansion. He appointed Muhammad ibn al-Qasim al-Thaqafi to lead the conquest of northwestern India, Qutayba ibn Muslim to conquer Transoxiana, and Mujja'a ibn Si'r to Oman. Although al-Hajjaj himself undertook no campaign during these years, his role was essential: not only did he select the generals who carried out these campaigns, but also "prepared them very carefully, sparing no expense, since he calculated that with victory he would recover his expenses many times over" (A. Dietrich).