The Euphrates Island has played an important role on the stage of events in Arab Islamic history since the beginning of the first century AH, due to its political, economic and geographical importance, and this importance has increased after the weakness of the Seljuk state and the establishment of many states represented in the Al-Jazeera and Levant. Through these patriarchal ideologies, Sinjar was a party to the political struggle between the countries of the Euphrates and Levant region by virtue of its geographical location between Mosul and the Levant and its economic and human importance and made political and military contributions to Salah al-Din al-Ayyubi in his efforts to achieve unity by standing by his side often against the forces hostile to him It also made a honorable military effort to confront the Franks invaders alongside other Arab powers