Persian Wars
THE ORIGINS OF THE ISLAMIC STATE
abu_l-Abbās_Aḥmad_ibn_Jābir_al-Balādhuri,_Ph._Kh._Hitti_The_origins_of_the_Islamic_State_Being_a_translation_from_the_Arabic_accompanied_with_annotations,_geographic_and_historical_notes_of_the_Kitāb_f
[Geoffrey Greatrex, Samuel N. C. Lieu] the Roman Empire