plague of Amwas
... that the deaths of the leading Muslim commanders in Syria from the plague of Amwas in 639 paved the way for the establishment of the Umayyad Caliphate?
... that the deaths of the leading Muslim commanders in <a href="./Bilad_al-Sham" id="mwB9g" rel="mw:WikiLink" title="Bilad al-Sham">Syria</a> from the <b id="mwB9k"><a href="./Plague_of_Amwas" id="mwB9o" rel="mw:WikiLink" title="Plague of Amwas">plague of Amwas</a></b> in 639 paved the way for the establishment of the <a href="./Umayyad_Caliphate" id="mwB9s" rel="mw:WikiLink" title="Umayyad Caliphate">Umayyad Caliphate</a>?