NATOThe North Atlantic Treaty Organization (NATO, ; , ), also called the North Atlantic Alliance, is an intergovernmental military alliance between 27 European countries, 2 North American countries, and 1 Eurasian country. The organization implements the North Atlantic Treaty that was signed on 4 April 1949.
NATO constitutes a system of collective security, whereby its independent member states agree to mutual defense in response to an attack by any external party. The NATO headquarters are located in Brussels, Belgium, while the headquarters of Allied Command Operations is near Mons, Belgium.
Since its founding, the admission of new member states has increased the alliance from the original 12 countries to 30. The most recent member state to be added to NATO was North Macedonia on 27 March 2020. NATO currently recognizes Bosnia and Herzegovina, Georgia, and Ukraine as aspiring members. An additional 20 countries participate in NATO's Partnership for Peace programme, with 15 other countries involved in institutionalized dialogue programmes. The combined military spending of all NATO members in 2020 constituted over 57% of the global nominal total. Members agreed that their aim is to reach or maintain the target defence spending of at least 2% of their GDP by 2024. Provided by Wikipedia