Qasim Belonged to the Bunu Thaqif. Muhammad Bin Qasim was an arab military commander in the services of ummayad cliphate who led the muslim conquest of Sindh during Umayyad Compagians in India.His Military exploits Led to the establishment of Arab Sindh and takeover of the region from the sindhi brahman dynasty and its ruler Raja Dahir who was Subsequently disapitated with his head sent to All hajjaj ibn e yousaf in Basra. with the Capture of Capital of Aror By Arab Forces. Muhammad Bin Qasim Became the first muslim to have successfully Captured Hindu Land which Marked the beginning of Muslim rule in India