Which preposition to use with castellani

with Occurrences 1%

Should not the Nicolottiblessed be the Madonna!always overcome the Castellani with Piero at their head, in those party battles on the bridges which had now grown to be as serious a factor in the lives of the gondoliers of Venice as they were disturbing to the citizens at large, and therefore the more to the glory of the combatants?

Which preposition to use with  castellani