The Bizantium – ottman conflict in the era of prince ottman

Abstract

The Seljuk sultan alaeddin kaqibad (1219-1237) granted qarajah dagh and domanij a resort for artgerl and his clan, in the border area with the byzantine empire, to take advantage of the military capabilities of this clan to repel the byzantine attacks on the lands of his state, so artgerl fulfilled his duty to the fullest extent as a prince of the Seljuk sultan. After his death, his son Othman, who assumed the leadership of the kay clan, driven by religious zeal with his invaders, set out attack the Byzantine cities, taking advantage of the state of weakness in the Byzantine Empire because of Emperor Andronicus interest in defending his empire in the west from Serbian ambitions more than his interest in the defenses of the Byzantine cities in the Anatolia, which relied on its own forces to confront Othman . Othman, whether during the period that he was a follower of the Seljuks or of the ILKhanids,emerged victorious from his confrontations with the rulers of the Byzantine cities, so he seized bile Gak, Yarahisar,and Incol, then declar his independence in 1299.

Othman established his emirate next to the Byzantine Empire, continuing to expand at its expense, expanding the borders of his emirate to the Sakarya River valley in the north, and the coasts of the Sea of Marmara in in the south, and after he achieved his victory over the Byzantine forces in the Battle of Qwen Hisari 1302,the rulers of the Byzantine cities were frustrated after they lost support from The Byzantine capital, Othman continued his struggle with the Byzantines until the year 1324, when he left that task to his son Orkhan after he was exhausted by fatigue and illness.