ローマ皇帝群像
Another controversy concerns the date of the battle. Although the vast majority of ancient and modern historians place it in 273, or 274, "after" the fall of Zenobia, Gibbon dates it before (270 or 271), on the basis of a letter from Aurelian given in the "Augustan History", which implies that Firmus, suppressed in 274, was the last of the usurpers.