Nyorai kuenderera mberi kweiyi ndima - Muna 810, caliph al-Amin, nemunin'ina wake, Al-Ma'mun, vakauya mukukakavadzana izvo mumwe nemumwe, izvo zvakazotungamira kuhondo yevagari vemo; muna Ndira 811, al-Amin akatanga zviri pamutemo Hondo Huru yeAbbasid yeVanhu
paakagadza Ali ibn Isa kuti ave gavhuna weKhurasan, akamuisa kumusoro kweuto guru risina kujairika revanhu 40 000, rakatorwa muboka revakuru rinozivikanwa se"abna′", ndokumutuma kuti abvise al-Ma'mun. Apo Ali ibn Isa akaenda kuKhurasani, anonzi akaenda nechikwata chamaketani esirivha okubatanidza nawo al-Ma'mun ndokumutakura kudzokera kuBaghdad. Mashoko okusvika kwaAli akaita kuti Khurasan atye, uye kunyange al-Ma'mun akarangarira kutiza. Mauto bedzi aaigona kushandisa aiva uto duku revarume vanenge 4 000 kusvika ku5 000, raiva pasi paTahir. Tahir akatumwa kunotarisana nokufambira mberi kwaAli, asi kwakanga kuchirangarirwa zvikuru sechinenge chiito chokuzviuraya, kunyange nababa vaTahir vamene. Mauto maviri aya akasangana paRayy, kumiganhu yekumadokero kweKhurasani, uye hondo yakatevera (3 Chikunguru 811) yakaguma nekukunda kukuru kweKhurasani, umo Ali akaurayiwa uye uto rake rakaparara parutivi rwekumadokero.