Kammala jumla mai zuwa: A kusan 811/2 Ishaq ya nada al-Amin a matsayin gwamnan Arminiyah, tare da dansa al-Fadl yana aiki a matsayin mataimakinsa a can. Bayan da aka fara
yakin basasa tsakanin al-Amin da al-Ma'mun ya yanke shawarar tsayawa a lardin kuma ya yi adawa da laftanar al-Ma'mun Tahir ibn Muhammad al-San'ani, wanda aka aika don kwace Arminiyah da Adharbayjan a madadin majiɓincinsa. Bayan ya tattara goyon baya daga sanannun sanannun mutane da yawa ya tashi zuwa Barda, amma ba da daɗewa ba wata babbar runduna ta haɗu da shi karkashin jagorancin Zuhayr ibn Sinan al-Tamimi wanda al-San'ani ya aika a kansa. Bayan yaƙin da ya ɗauki mafi yawan yini, Ishaq da magoya bayansa sun ci nasara, yayin da aka kama ɗansa Ja'far kuma aka tura shi azaman fursuna zuwa al-Ma'mun.