The Ottoman Empire signed an alliance agreement with Germany right after the start of the First World War. After the Alliance treaty, political and military targets were determined in the meeting held among the leaders of the Committee of Union and Progress to determine the policy to be followed. In this meeting, it was also decided to set up an Teşkilat-ı Mahsusa, which would carry out a guerilla war for the army. Establishment of Teşkilat-ı Mahsusa, immediately after the alliance signed with Germany, shows that Germany is also looking at this kind of initiative. It was established under the proposal of Teşkilat-ı Mahsusa Enver Pasha under the Ministry of War. Süleyman Askeri Bey, who dealt with the guerilla war, was brought to the head of the Teşkilat-ı Mahsusa. The next two presidents were elected among soldiers of military origin. Unionist officers formed the core of the organization. Teşkilat-ı Mahsusa carried out activities in the Balkans, Caucasus, Morocco, Tripoli, Afghanistan, Iran, Iraq and Syria during the First World War. However, during the war, the Teşkilat-ı Mahsusa underwent some changes. After Ali Başhampa, a civilian, became the president, the name of Teşkilat-ı Mahsusa became Umur-ı Şarkiyye Dairesi, and Teşkilat-ı Mahsusa became more central and civil. Following this change, Teşkilat-ı Mahsusa started to conduct propaganda rather than military activity. In this article, the activities carried out by Teşkilat-ı Mahsusa during the First World War will be evaluated.

Keywords: Teşkilat-ı Mahsusa, Enver Pashaa, the Committee of Union and Progress, the Ottoman Empire