Nyorera kupfuurira kweiyi ndima - Kune rimwe divi, munyori wenhoroondo M. A. Shaban anoona mushandirapamwe se "kubudirira kushoma" zvakanyanya, uye anoshoropodza kutarisisa kwaHaruni kwe "pfungwa imwechete" kune veByzantine se "kuedza kwakatsauswa zvachose". Sekureva kwaShabani, kwete chete kuti maByzantine aive asina kugona chaiko (kana chinangwa) chekutyisidzira zvakanyanya Caliphate, asi kuronga kwaHaruni kwakatungamira mukuyerera kwevarwi vekumabvazuva kubva kuKhurasan, izvo zvakashora tsika dzechiSyria neIraqi zvechiuto uye zvakagadzira kutsemuka kwakakonzera Fitna yechina.
, hondo yevagari vemo yeAbbasid yakatanga mushure mekufa kwaHarun. Kurwisana uku, pakati pevanakomana vaHaruni al-Amin () naal-Ma'mun () kwaireva kuti Abbasid Caliphate yakanga isingakwanisi kushandisa shanduko dzeByzantine muBalkans. Zvechokwadi, hondo ya806 nokurwisa kusingabatsiri kwa807 zvinoratidza hondo huru dzokupedzisira, dzakarongwa nechepakati, dzevaAbbasid kurwisa Byzantium kwemakore anopfuura makumi maviri. Kurwisa kwakasarudzika uye kurwisa kwakapfuurira panyika pamwe chete negungwa, uye, pasina maAbbasi, vatungamiriri vechiMuslim vemuno vakakunda Krete ndokutanga kukunda kweSicily muma820. Kunyange zvakadaro, mashandiro makuru pamuganhu wepasi kumabvazuva kweAsia Minor pakati pemadzimambo maviri akatangazve chete mushure mekupinda muhushe kwaMambo Theophilos (), uyo kusangana kwake nevakuru veAl-Ma'mun naAl-Mu'tasim () kwakaguma nekupinda kukuru naAl-Ma'mun muna 830-833, uye Sack yeAmorium naAl-Mu'tasim muna 838.