the Carolingian Empirethe Byzantine Empirethe Roman Empirethe Caliphate of CordobaFeudalism developed after the collapse of what empire?Elon.io is an online learning platformWe have an entire course teaching World History 1 grammar and vocabulary.Start learning World History 1 nowYour questions are stored by us to improve Elon.ioYou've reached your AI usage limitSign up to increase your limit.