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.
Campbell Barracks
On July 1, 2004, the Headquarters once again transitioned in a ceremony marking its designation to Component Command-Land Headquarters, Heidelberg. New structure is currently represented by 15 NATO nations, including its newest members Lithuania and Slovakia. This transformation to CC-Land HQ HD was part of a major NATO restructuring, and realized a fundamental change in headquarters mission and operations, as this headquarters turns its focus from one of six joint sub-regional command headquarters, to assume roles as one of only two land centric headquarters in the NATO command structure designed to provide expeditionary command and control at the operational level of conflict.