Answer:
He conquered the Sindh and Punjab regions along the Indus River for the Umayyad Caliphate. ... Thus providing the Umayyad Caliphate the legitimate cause, that enabled them to gain a foothold in the Makran, and Sindh regions. The Umayyad caliphate ordered Muhammad Bin Qasim to attack over Sindh.
Step-by-step explanation: