NATO expansion

NATO expansion refers to the process where the North Atlantic Treaty Organization has welcomed new member countries, particularly from Eastern and Central Europe, since the end of the Cold War. Originally formed for mutual defense against the Soviet Union, NATO has grown to include nations that seek security and political stability in a cooperative alliance. This expansion has sometimes raised tensions with Russia, which views it as a threat to its influence. Countries join NATO for protection, shared values of democracy, and collaboration on security issues, fostering a collective defense commitment among member states.