Enlargement of NATO
As of 2018, NATO officially recognizes four aspiring members: Bosnia and Herzegovina, Georgia, Macedonia and Ukraine. The Federation of Bosnia and Herzegovina within Bosnia and Herzegovina has expressed willingness to join NATO, however, it faces consistent political pressure from Republika Srpska, the other political entity in the country, alongside its partners in Moscow. Macedonia has been prevented from joining the alliance by Greece, one effect of the Macedonian naming dispute. Future expansion is currently a topic of debate in several countries outside the alliance, and countries like Sweden, Finland, and Serbia have open political debate on the topic of membership, while in countries like Ukraine, support and opposition to membership is tied to ethnic and nationalist ideologies. The incorporation of countries formerly part of the Eastern Bloc and the Soviet Union has been a cause of increased tension between NATO countries and Russia.
Afghanistan
Afghanistan became a member of the United Nations in 1946. It enjoys cordial relations with a number of NATO and allied nations, particularly the United States, Canada, United Kingdom, Germany, Australia, and Turkey. In 2012, the United States and Afghanistan signed their Strategic Partnership Agreement in which Afghanistan became a major non-NATO ally. Afghanistan also has friendly diplomatic relations with neighboring China, Iran, Pakistan, Tajikistan, Turkmenistan, and Uzbekistan, including with regional states such as Bangladesh, India, Japan, Kazakhstan, Nepal, Russia, South Korea, the UAE, and so forth. The Afghan Ministry of Foreign Affairs continues to develop diplomatic relations with other countries around the world.