By 1326, lands around Nicaea had fallen into the hands of Osman I. He had also captured the city of Bursa, establishing a capital dangerously close to the Byzantine capital of Constantinople.
Prin 1326, teritoriile din jurul Niceei au căzut în mâinile lui Osman I. A capturat, de asemenea, orașul Bursa, stabilind o capitală periculos de aproape de Constantinopol.