Following his rise to the throne, al-Mu'tadid continued his father's policies, and restored caliphal authority in the Jazira, northern Syria, and parts of western Iran. He established an effective administration, but the incessant campaigning, and the need to keep the soldiery satisfied, meant that it was almost totally geared towards providing the funds necessary to maintain the army. Nevertheless, al-Mu'tadid managed to accumulate a considerable surplus in his ten-year reign. At the same time the bureaucracy grew in power, it also saw a growth in factionalism, with two rival "clans" emerging, the Banu'l-Furat and the Banu'l-Jarrah. The two groups represented primarily different factions in a struggle for office and power, but there are indications of "ideological" differences as well: many of the Banu'l-Jarrah families hailed from converted Nestorian families and employed Christians in the bureaucracy, in addition to maintaining closer ties with the military, while the Banu'l-Furat tried to impose firm civilian control of the army and (not quite openly) favoured Shi'ism.