the distance between Osman’s cities and castle. Inagol was 20km south of yenisehir(Osman’s capital city), iznik was 20 km in north of yenisehir, beligic 40km,sogut 60km, karacahisar 100 km east of yenisehir, marmaracik 18km in West and bursa was 40 km away from marmaracik in West, so inagol iznik and marmaracik was reachable in half …