The surviving Arabic chronicle tradition records the rebellions as a sequence of individual battles and sieges across Iraq, Persia and Arabia rather than one accounted campaign, and no modern historian has combined the separate engagements into a war-wide casualty total.
What would resolve this A systematic tally of the individual battle and siege accounts already preserved in the early Arabic chronicle tradition, cross-checked against what independent evidence of the period's population and military scale can bear, of the kind no historian of the rebellions has yet undertaken.
OpenEarly Islamic history; Arabic chronicle source criticismHugh Kennedy, The Prophet and the Age of the Caliphates: The Islamic Near East from the Sixth to the Eleventh Century