AyaNikolaissentbytheByzantineEmperor,AndronikosIItobecomethenewTekfurofİnegölfollowedbyErtuğrul'sreturninthetribe.Meanwhile,YavlakArslan,thenewUçBey,seekstocreatehisownstateandseesOsmanasanobstacle,laterontheyuniteagainstthenewthreatcreatedbythenewIlkhanoftheIlkhanate,whoallieswithNikolaagainsttheTurksofAnatolia.BalaalsofacesthearrivalofTargun,Nikola'sspywhoallieswithOsmantosaveherfather,İnalBey.Alongwiththeseproblems,OsmaniselectedasthenewBeyafterhisfather'sdeath,whilsthedecidestomarryasecondwifeaccordingtohisfather'swill.AfterTargun'sdeath,OsmanmeetsMalhunHatunandinitiatesamajorbattlewiththeByzantines,historicallyknownastheBattleofMountArmenia,aswellastryingtofindthetraitorintheKayı,ashisjealousuncleDündarhelpstheByzantinesstirtrapsforhim.DündariseventuallyexecutedbyOsmanforhisbetrayal.FollowingthearrivalofÖmerBey,fatherofMalhunHatun,GeyhatusendsKaraŞamanTogay,sonofBaycuNoyan,toeliminatebothOsman'sKayıandÖmer'sBayındır,butafteraseriesofconflictsbetweenthetwotribes,TogayfailsandiskilledbyOsman.NikolaislaterdefeatedbyOsman,withthesupportofSeljukSultanMesudII,thoughhesurvives.OsmanlatermarriesMalhunHatuninapoliticalmarriage,whoeventuallygivesbirthtoOsman'sfirstsonOrhan,whilsthisfirstwifeBalaHatunbecomespregnant.