The Odrysians
The Odrysians (Odrysae or Odrusai, Ancient Greek: "Οδρύσαι") were one of the most powerful Thracian tribes that dwelled in the plain of the Hebrus river. This would place the tribe in the modern border area between Southeastern Bulgaria, Norteastern Greece and Eropean Turkey, centered around the city of Edirne. The river Artescus passed through their land as well. Xenophon writes that the Odrysians held horse races and drank large amounts of wine after the burial of their dead warriors. Thucydides writes on their custom, practised by most Thracians, of giving gifts for getting things done. Herodotus is the first that mentions the Odrysae.
Read more about this topic: Odrysian Kingdom