Relations between Turkey and the institutions of European integration began with Turkey's application to become an associate member of the European Economic Community (EEC) in 1959. Turkey applied for become a full member of the EEC in 1987, but will not gain candidate status until 1999. Since 1999, relations between Turkey and the European Union (EU) have gained momentum and Turkey's accession negotiations with the EU began in 2005. Since then, discussions on the implications of Turkey's potential EU membership have become more serious and extensive in both Turkey and the EU. the potential advantages and disadvantages of Türkiye's EU membership for both Turkey and the EU. Considers economic, social, political and security factors. When considering the EU enlargement process, we often talk about Türkiye and the future of EU-Türkiye relations. As Heinz Kramer, head of the EU foreign affairs research unit at the Stiftung Wissenschaft und Politik in Berlin, noted, Turkey and the EU share a decades-long common history of contract-based relations since the late 1990s. 50 which ultimately led to the start of accession negotiations in early October 2005. Turkey's relations with the institutions of European integration began with the Ankara Agreement signed in September 1963. Since then there have been ups and downs in relationships. Since the start of Turkey's EU accession negotiations in early October 2005, relations have gained new momentum and ambiguities have begun to disappear.Turkey and the history of the EUThe founder of the Republic of Turkey, Mustafa Kemal Atatürk, "emphasized reaching and even moving forward beyond the level of contemporary civilization as the goal of the Turkish nation. Within the framework of this... half of the document... long-standing foreign policy projects. The ambiguities regarding the future of the accession process would be resolved. Turkey would participate in the policies of the European Union as a global player, and this would strengthen the EU's position over time. Membership in the EU would provide Turkey with a number of opportunities to play a role more active role on the international scene. After becoming a member, Turkey could become an important player in strengthening and implementing the EU's CFSP, which would consolidate its position in the EU. Furthermore, Turkey's membership of the EU would be beneficial for resolving problems between Türkiye and Greece. From the perspective of security affairs, with EU membership, Turkey would fully participate in the EU ESDP and other security initiatives. Both the accession process and membership would have political and social effects on Türkiye..