Muhammad bin Qasim

31 December 695 – 18 July 715 was an Umayyad general who conquered the Sindh and Multan regions along the Indus River for the Umayyad Caliphate. He was born and raised in the city of Ta'if
According to Berzin, Umayyad interest in the region occurred because of attacks from Sindh Raja Dahir on ships of Muslims and their imprisonment of Muslim men and women

Muhammad bin Qasim's success has been partly ascribed to Dahir being an unpopular Hindu king ruling over a Buddhist majority who saw Chach of Alor :
He won the fight because
 Superior military equipment; such as siege engines and the Mongol bow.
    Troop discipline and leadership.
    The concept of Jihad as a morale booster.
    Religion; the widespread belief in the prophecy of Muslim success.
    The Samanis being persuaded to submit and not take up arms because the majority of the population was Buddhist who were dissatisfied with their rulers, who were Hindu.
    The laboring under disabilities of the Lohana Jats.
    Defections from among Dahirs chiefs and nobles
Mosque of Muhammad bin Qasim