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.