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.
Try to answer this question if possible (otherwise reply "unanswerable"): When did the first rudiments of state organizations appear among the Slavs?
When their migratory movements ended