Muhammad bin Qasim defeated whom during the conquest of Sindh?

Muhammad bin Qasim was a young Umayyad general who led the Muslim conquest of Sindh in 712 CE. During this campaign, he defeated Raja Dahir, the Hindu ruler of Sindh, in the Battle of Aror (Rawar). The victory brought Sindh under Umayyad rule and marked the beginning of Muslim political presence in the Indian subcontinent. Muhammad bin Qasim established administrative reforms, granted protection to local populations who accepted the new rule, and promoted trade and governance. His conquest is regarded as a significant milestone in the history of South Asia and the spread of Islam in the region.