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Around 400 to 300 B.C. traces of Celtic people coming from the west are found in the Jászság. Celtic graveyards were found near Jászberény at Hajta and Jászjákohalma. During the first century A.D., Iatzygic tribes migrated from Sarmatia to the later Jászság. After being defeated by the Romans during the Marcomannic Wars, the Iazyges paid tribute to Rome and they became a part of the Roman border defense at the Limes Sarmatian. Their settlements can be still found during the invasion of the Huns in the 5th century A.D. In the middle of the 6th. century, Eurasian Avars began to settle the Jász-region who in turn was pushed away around 895 by the immigrating Hungarians