Accession of Macedonia to NATO
Following an agreement in June 2018 to rename the country the Republic of North Macedonia, NATO agreed to consider extending an invitation to the country to join at its summit on 11–12 July. On 11 July 2018, NATO invited Macedonia to begin membership talks, saying the country could join the organization once the naming issue was resolved. Formal accession talks began on 18 October 2018. Greece is expected to be the first NATO member state to ratify Macedonia’s NATO accession protocol.
Montenegro
Montenegro was a member of NATO's Partnership for Peace program and then became an official candidate for full membership in the alliance. Montenegro applied for a Membership Action Plan on 5 November 2008, which was granted in December 2009. Montenegro is also a member of Adriatic Charter. Montenegro was invited to join NATO on 2 December 2015 and on 19 May 2016, NATO and Montenegro conducted a signing ceremony at NATO headquarters in Brussels for Montenegro's membership invitation. Montenegro became NATO's 29th member on 5 June 2017, despite Russia's objections. The government plans to have the army participate in peacekeeping missions through the UN and NATO such as the International Security Assistance Force.