North Macedonia is a member state of the North Atlantic Treaty Organization (NATO). In 1995, the country joined the Partnership for Peace. It then began taking part in various NATO missions, including the International Security Assistance Force and the Resolute Support Mission in Afghanistan. At the 2008 Bucharest summit, Greece vetoed the country's invitation to join; however, NATO member states agreed that the country would receive an invitation upon resolution of the Macedonia naming dispute. Following an agreement in June 2018 to rename the country, representatives of NATO member states signed a protocol on the accession of North Macedonia to NATO on 6 February 2019. Over the next thirteen months, all of NATO's 29 member states ratified the protocol. The accession protocol entered into force on 19 March 2020, allowing North Macedonia to deposit its instrument of accession and thereby become a member state of NATO on 27 March 2020.