The article describes the relationship between the Avar Khaganate and Byzantium, which occupies a special place in the history of international relations of the VI-VIII centuries. during this period, the Byzantine Empire was weak and many issues in foreign policy were achieved by diplomatic methods. In the manuscripts of famous historians of Byzantium, we will find valuable information about the connection between accidents and the Byzantines, and the migration of accidents to the steppes of Eastern Europe.