 Upon being made aware of the Egyptian advance on the western frontier in 1811, the Wahhabi amir reduced his garrisons in Bahrain and Zubarah in order to redeploy his troops.Said bin Sultan, ruler of Muscat, capitalised on this opportunity and raided the Wahhabi garrisons on the eastern coast, setting fire to the fort in Zubarah.The Al Khalifa were effectively returned to power thereafter.