, ▁h agi ography , ▁military ▁manual s ▁( in ▁particular ▁the ▁Str ateg ikon ▁of ▁Maurice ▁from ▁the ▁beginning ▁of ▁the ▁ 7 th ▁century ), ▁and ▁other ▁non - liter ary ▁sources , ▁such ▁as ▁ep ig raph y , ▁ar che ology , ▁and ▁num ism at ics . ▁None ▁of ▁these ▁sources ▁contains ▁a ▁coh er ent ▁account ▁of ▁any ▁of ▁the ▁campaign s ▁and ▁con quest s ▁of ▁the ▁Muslim ▁arm ies , ▁but ▁some ▁do ▁contain ▁in valu able ▁details ▁that ▁surv ive ▁now here ▁else . ▁ ▁See ▁also ▁▁ ▁A egy pt us ▁( R oman ▁province ) ▁ ▁Battle ▁of ▁T ours ▁ ▁By z antine – O tt oman ▁Wars ▁ ▁Muslim ▁con quest s ▁ ▁Sp read ▁of ▁Islam ▁ ▁Notes ▁ ▁References ▁ ▁Cit ations ▁ ▁S ources ▁▁ ▁Primary ▁sources ▁▁ ▁A hm ad ▁ibn ▁Y ah ya ▁al - Bal ad h uri . ▁Fut uh ▁al - B uld an . ▁See ▁a ▁translated ▁ex cer pt ▁(" The ▁Battle ▁of ▁Y arm ou k ▁and ▁after ") ▁in ▁Med ieval ▁S ources . ▁▁▁ ▁The oph anes ▁the ▁Conf essor . ▁Chron icle . ▁See ▁original ▁text ▁in ▁Document a ▁C athol ica ▁Om nia ▁( PDF ). ▁ ▁Z on ar as , ▁Jo annes , ▁Ann ales . ▁See ▁the ▁original ▁text ▁in ▁Pat ro log ia ▁Gra eca . ▁▁ ▁Second ary ▁sources ▁ ▁Further ▁reading ▁ ▁External ▁links ▁▁▁▁▁▁▁ ▁Category : In vas