Don wannan dalili dole ne mu yi watsi da iyakokin siyasa na zamani kuma mu kalli abubuwan da suka faru a cikin Babban Iran, wani yanki mai girma da ke rufe Caucasus, Mesopotamia, Anatolia, da Asiya ta Tsakiya, bayan iyakokin Iran na yanzu. Yanayin wannan yanki, tare da manyan tsaunukan tsaunuka, yana taka muhimmiyar rawa a yawancin labaran almara. Ana ɗaukar karni na biyu na BC a matsayin zamanin ƙaura saboda fitowar sabuwar hanyar yumbu na Iran a yammacin Iran, kwatankwacin farkon yakin arewa maso gabashin Iran, yana ba da shawarar zuwan mutanen tsohuwar Iran. Wannan yumbu, mai launin toka mai launin toka zuwa baƙar fata, ya bayyana a kusan 1400 kafin haihuwar Kristi. Ana kiransa Early Grey ko Iron I, sunan na ƙarshe yana nuna farkon Zamanin ƙarfe a wannan yankin Tambaya: Me ya kamata mu kalli maimakon iyakokin siyasa idan ya zo ga Iran ta zamani?
ci gaban tarihi a cikin Babban Iran