After the death of Philip, Alexander the Great passed through the lands of the Odryssians in 335-334 BC, crossing the Haemus ranges and after three encounters (Battle of Haemus, Battle at Lyginus river, Battle at Peuce Island) defeated and drove the Triballians to the junction of the Lyginus at the Danube, 3,000 Triballi were killed, the rest fled. Syrmos and his people took refuge in the Danubian island of Peukê where most of the remnants of defeated Thracians exiled. The successful Macedonian attacks terrorized the tribes around the Danube, the autonomous Thracian tribes sent tributes for peace, Alexander was satisfied with his operations and accepted peace because of his greater wars in Asia.
|King of the Triballi
- Plutarch's Lives by Plutarch, 2008, ISBN 1-4404-1432-7, page 183: "... Danube, and by winning a signal victory over Syrmus, the King of the Triballi. After this, as he heard that the Thebans had revolted, ..."
- Fanula Papazoglu, The central Balkan tribes in pre-Roman times, Hakkert, 1978. ISBN 90-256-0793-4. p.73.
- Heckel, W. (2006). Who's Who in the Age of Alexander the Great: Prosopography of Alexander's Empire. Wiley. p. 258. ISBN 9781405112109. Retrieved 2014-11-23.
- Gebhardi, L.A. (1778). Geschichte des Reichs Hungarn und der damit verbundenen Staaten. p. 75. Retrieved 2014-11-23.
- Papazoglu, p. 74