 Kawus ibn Kharakhuruh, the son of the Afshin Karākana, withdrew his allegiance from the Arabs.However, shortly after Ma'mun arrived in Baghdad from the east (817-18 or 819-20), a power struggle and dissension broke out among the reigning family of Oshrusana.According to most of the sources, al-Ma'mun's heir, Al-Mu'tasim seconded high-ranking officers to serve under him and ordered exceptionally large salaries, expense allowances, and rations for him.