Ilkhanate campaign to Bithynia

Bithynia Campaign (1308)
Part of Byzantine–Ottoman wars
Date 1308 Location Bithynia
Belligerents
Ilkhanate Byzantine Empire	Ottoman Beylik
Commanders and leaders
Unknown Ilkhanid leader	Osman I
Strength
30,000	Unknown
Casualties and losses
Unknown	Unknown

During these wars, Byzantium asked for help from the Ilkhanids and the Ilkhanids sent an army to defeat the Ottoman Beylik. These wars were part of the struggles between Byzantium and the Ottomans. Byzantium asked for help from the Ilkhanids to counter the Ottoman Beylik and the Ilkhanids sent an army to defeat the Ottoman Beylik.

Campaign

Osman I increased the pressure on Nicea-Bursa after the Catalan mercenaries failed to maintain their success and withdrew from the region in disagreement with the Byzantines. However, in 1305, the Emperor sent a request to the Ilkhanid Olcaytu to give his illegitimate daughter as a wife and to form an alliance against the Turks. In response, he received the promise that the Ilkhanids would send enough troops. However, this was not to be, and the arrival of the Mongols caused Osman Beg to step up his activities even more. Indeed, in 1307 he took the fortress of Trikokkia and cut the connection between Nicea and Izmit. Pachimeres reports that towards the end of this year the Mongol army arrived in Bithynia and liberated many places. It is unclear whether this information is true or wishful thinking. But even if it is true, it can be said that Osman Beg quickly recaptured the region afterwards. So the battle was an Ilkhanid victory in terms of a Mongol-Ottoman conflict, but an Ottoman victory in terms of a conflict between the Mongol-Byzantine alliance and the Ottomans.