I copied the following from Wikipedia
With the ascent of al-Walid I, Hajjaj's reputation grew due to his selection and deployment of numerous successful generals who expanded the Islamic empire. Hajjaj was given these powers due to his high status in the Umayyad government, and he exhibited a lot of control over the provinces that he governed.
Among these generals was the teen-aged Muhammad bin Qasim, who in 712 was sent to Sindh in India. Compared to his general Hajjaj was more hardline insisting that pagans (or those who were not people of the book) be killed or enslaved.
Qutaibah bin Muslim was sent to conquer Turkestan which he did, even penetrating the borders of China and getting a tribute payment from the Chinese emperor. Perhaps his most successful general was Musa bin Nusair who consolidated control over North Africa and who sent Tariq bin Ziyad to invade Spain.
those were arabs not turkish
