Contemporary historical analysis may be more accurate than the medieval sources, as the modern figures are based on estimates of the logistical ability of the countryside to support these numbers of men and animals. Both Davis and Hanson point out that both armies had to live off the countryside, neither having a commissary system sufficient to provide supplies for a campaign. Other sources give the following estimates: "Gore places the Frankish army at 15,000–20,000, although other estimates range from 30,000 to 80,000. In spite of wildly varying estimates of the Muslim force, he places that army as around 20,000–25,000. Other estimates also range up to 80,000, with 50,000 not an uncommon estimate."