Back in Baghdad, al Ma’mun finally began to play an active role in running the Abbasid state. The five years he spent in Khurasan were rough on the rest of the caliphate, but especially disastrous for Iraq. The caliph now had to restore peace and central control to practically every province. His leadership proved exceptional: even without a ready set of advisors to draw upon, al Ma’mun found the right people to fill the many vacancies he had in his administration. Over the course of his reign he steadily repaired the caliphate’s grip on the umma, undoing much of the harm done by the great fitna.