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The ancient Thracians were a group of Indo-European tribes who spoke the Thracian language - a rare branch of the Indo-European language family. Those peoples inhabited the Eastern, Central and Southern part of the Balkan peninsula, as well as the adjacent parts of Eastern Europe.
- Christopher Webber, Angus McBride (2001). The Thracians, 700 BC - AD 46. Osprey Publishing. .