The Battle of Aror (712 CE) was fought between the Arab Umayyad Caliphate and the Indian kingdom of Pala Empire.
Mohammad Bin Qasim (MBQ) (695-715 CE) of Arab Umayyad Caliphate defeated Raja Dahir Sen (663-712 CE) of India in the Battle of Aror (712 CE). Raja Dahir and his brother Dahar-Sena had fought and replused the Arabs multiple times. But as fate would have it, the buddhists of Sindh and the local ‘Med’ tribe, who were alienated by Dahir had joined MBQ. They helped MBQ to cross Sindhu river at Nerun giving MBQ entry to Raja Dahir’s garrison.