The Young Turks became a truly organized movement with the Committee of Union and Progress (CUP) as an organizational umbrella. They recruited individuals hoping for the establishment of a constitutional monarchy in the Ottoman Empire. In 1906, the Ottoman Freedom Society (OFS) was established in Thessalonica by Mehmed Talaat. The OFS actively recruited members from the Third Army base, among them Major Ismail Enver. In September 1907, OFS announced they would be working with other organizations under the umbrella of the CUP. In reality, the leadership of the OFS would exert significant control over the CUP.