Pertempuran Bapheus

Bapheus was the first major victory for the nascent Ottoman emirate, and of major significance for its future expansion: the Byzantines effectively lost control of the countryside of Bithynia, withdrawing to their forts, which, isolated, fell one by one. The Byzantine defeat also sparked a massive exodus of the Christian population from the area into the European parts of the Empire, further altering the region's demographic balance. Coupled with the disaster of Magnesia, which allowed the Turks to reach and establish themselves on the coasts of the Aegean Sea, Bapheus thus heralded the final loss of Asia Minor for Byzantium. The Ottoman conquest of Bithynia was nonetheless gradual, and the last Byzantine outpost there, Nicomedia, fell only in 1337.