Pedzisa mutsara unotevera: Munenge muna 650 CE, panguva yekukunda kweArabhu kweSasanian Empire, mutongi weSasanian Empire Yazdegerd III aiedza kuunganidzazve nekuunganidza mauto akatenderedza Tokharistan uye aitarisira kuwana rubatsiro rwevaTurkey, mushure mekukundwa kwake nemaArabu mu
Hondo yeNihâvand (642 CE). Yazdegerd pakutanga akatsigirwa neHephthalite Principality yeChaghaniyan, iyo yakamutumira mauto kuti amubatsire kurwisa maArabu. Asi Yazdegerd paakasvika muMerv (iri muTurkmenistan yemazuva ano) akada mutero kubva ku"Marzban" yeMarw, achirasikirwa nerutsigiro rwake uye achimuita mubatanidzwa nemutongi weHephthalite weBadghis, Nezak Tarkan. Mutongi weHepthalite weBadghis akabatana ne "Marzban" weMerv akarwisa Yazdegerd ndokumukunda muna 651. Yazdegerd III akapukunyuka noupenyu hwake asi akaurayiwa munharaunda yeMerv nokukurumidza pashure pacho, uye vaArab vakakwanisa kutora guta reMerv gore rimwe chetero.