Bulgaria became a member of the [[North Atlantic Treaty Organization]] on March 29, 2004, and a member of the European Union on January 1, 2007. Bulgaria is a member of the United Nations and in 2002-2003 served a 2-year term as a nonpermanent member on the UN Security Council. Bulgaria served as Chair-In-Office of the Organization for Security and Cooperation in Europe (OSCE) in 2004. | Bulgaria became a member of the [[North Atlantic Treaty Organization]] on March 29, 2004, and a member of the European Union on January 1, 2007. Bulgaria is a member of the United Nations and in 2002-2003 served a 2-year term as a nonpermanent member on the UN Security Council. Bulgaria served as Chair-In-Office of the Organization for Security and Cooperation in Europe (OSCE) in 2004. |