Undoubtedly, the collapse of the Ottoman Empire is considered as one of the most important and influential political events of world of Islam in twentieth century/ fourteenth century of AH. About the importance of this issue, it’s enough to say that the reflect of the impact of this event in the present century and specially in recent years can also be seen. Important factors that contributed to the collapse, long years this trend continued until the First World Warput an end to this trend. What was the high light, In dependence nations under the empire. The nationalism of the late 19 th century was little sense among the nations, and during the years leading up to World War I, it was in tense And lead to expedite action on behalf of the family that led to the collapse of the empire. The main issue in this study that weexamine, the role of majorethnic Ottoman Empire in order to achieve the irnationalistic feelings That led to the collapse of the Ottoman Empire.