Conversation so far:
Can you tell me about Vlachs in the 13th century?
At the end of the 13th century, during the reign of Ladislaus the Cuman, Simon de Keza wrote about the Blacki people and placed them in Pannonia with the Huns.

Question: Can you tell me what led to this?
Self-contained rewrite: Can you tell me what led Simon de Keza writing about the Blacki people?