When their migratory movements ended, there appeared among the Slavs the first rudiments of state organizations, each headed by a prince with a treasury and a defense force. Moreover, it was the beginnings of class differentiation, and nobles pledged allegiance either to the Frankish/ Holy Roman Emperors or the Byzantine Emperors.
When did the first rudiments of state organizations appear among the Slavs?
{'text': 'When their migratory movements ended', 'answer_start': 0}