Mu ufumu wotukuka wa Pars muli likulu lachifumu la Ecbatana, mzinda waulemerero ndi wodabwitsa, wolamulidwa ndi Mfumu yosagonjetseka komanso yowopsa Andragoras. Arslan ndi kalonga wachinyamata komanso wachidwi wa Pars yemwe, ngakhale atayesetsa kwambiri, sakuwoneka kuti ali ndi zomwe zimafunika kuti akhale mfumu yoyenera ngati abambo ake. Ali ndi zaka 14, Arslan amapita kunkhondo yake yoyamba ndipo amataya chilichonse pamene nkhungu yankhondo yothira mwazi ikupita kumalo oyaka moto, zomwe zimamupangitsa kuti ayang'ane ndi kutha kwa ufumu wake womwe kale unali waulemerero. Komabe, ndi tsogolo la Arslan kuti akhale wolamulira, ndipo mosasamala kanthu za mayesero omwe akukumana nawo, tsopano ayenera kuyamba ulendo wokatenganso ufumu wake wakugwa.
