After Benevento, Clement IV continued the papal policy of employing Charles to resist the power of the Ghibellines, although with this support was the fear that the Angevins themselves would, like the Hohenstaufen before them, attempt to dominate northern as well as southern Italy and thus menace the temporal power of the Holy See, despite explicit promises by Charles that he would not lay claim to northern Italy. However, the papacy still considered its ancient Hohenstaufen enemy to be the primary threat for the time being, and when Conradin, now aged 15, entered Italy with his army in September 1267 to challenge Charles' rule of Sicily, Clement immediately sought Charles' support in defeating them in Tuscany, appointing Charles as papal vicar.