Battle of the Rhyndacus (1211)
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Battle of the Rhyndacus 1211
Battle of the Rhyndacus
Part of the Nicaean-Latin wars
Constantinople area map.svg
Map of the area of the Propontis in the Middle Ages. The Battle of the Rhyndacus was fought near Lopadion.
Date15 October 1211

Latin victory

Palaiologos flag Empire of Nicaea Blason Empire Latin de Constantinople.svg Latin Empire
Commanders and leaders
Palaiologos flag Theodore I Blason Empire Latin de Constantinople.svg Henry of Flanders
unknown 2,000
275 knights & escorts[1]

The Battle of the Rhyndacus was fought on 15 October 1211 between the forces of two of the main successor states of the Byzantine Empire, the Latin Empire and the Byzantine Greek Empire of Nicaea, established following the dissolution of the Byzantine state after the Fourth Crusade.

The Latin emperor, Henry of Flanders, desired to expand his territory in Asia Minor at the expense of the Nicaeans. He had already achieved a victory in 1205 at Adramyttium, but the need to counter the Bulgarians in Europe had forced him to conclude a truce and depart. By 1211, only a small exclave around Pegai remained in Latin hands. Taking advantage of the losses suffered by the Nicaean army against the Seljuks in the Battle of Antioch on the Meander, Henry landed with his army at Pegai and marched eastward to the Rhyndacus river. Henry had probably some 260 Frankish knights. Laskaris had a larger force overall, but only a handful of Frankish mercenaries of his own, as they had suffered especially heavily against the Seljuks. Laskaris prepared an ambush at the Rhyndacus, but Henry assaulted his positions and scattered the Nicaean troops in a day-long battle on 15 October. The Latin victory, won reportedly without casualties, was crushing: after the battle Henry marched unopposed through Nicaean lands, reaching south as far as Nymphaion.

Warfare lapsed thereafter, and both sides concluded the Treaty of Nymphaeum, which gave the Latin Empire control of most of Mysia up to the village of Kalamos (modern Gelenbe), which was to be uninhabited and mark the boundary between the two states.


  1. ^ Van Tricht 2011, p. 187.


  • Brand, Charles M. (1991). "Rhyndakos River". In Kazhdan, Alexander (ed.). The Oxford Dictionary of Byzantium. Oxford and New York: Oxford University Press. p. 1794. ISBN 0-19-504652-8.
  • Macrides, Ruth (2007), George Akropolites: The History - Introduction, translation and commentary, Oxford University Press, pp. 148-153, ISBN 978-0-19-921067-1
  • Van Tricht, Filip (2011). The Latin Renovatio of Byzantium: The Empire of Constantinople (1204-1228). Leiden: Brill. ISBN 978-90-04-20323-5.

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