Siege of İnegöl

Siege of İnegöl
Part of the Byzantine–Ottoman wars

Illustration of Osman rallying his warriors into battle
Date28 September 1299
Location
Result Kayi victory
Belligerents
Kayı Byzantine Empire
Commanders and leaders
Osman Ghazi
Turgut Alp
Gündüz Alp 
Andronikos II Palaiologos
Agios Nikolaos 

The siege of İnegöl took place between Agios Nikolaos, the governor of the fort, and the Kayı army under the command of Turgut Alp. This conquest was one of the first conquests in Ottoman history after the siege of Kulaca Hisar. After the end of the siege, Tekfur Nikolaos was executed by Turgut Alp. The conquest took place in 1299. This battle triggered the Battle of Bapheus, where the Byzantines attempted to reconquer the lost territory, which in turn led to the Siege of Bursa eventually leading to the establishment of the Ottoman Beylik.