Southeast Europe
This concept is based on the boundaries of the Balkan peninsula. The countries that have been described as being entirely within the region are: Albania, Kosovo, Bosnia and Herzegovina, Bulgaria, Macedonia and Montenegro.
Accession of Kosovo to the European Union
On 6 February 2018, the European Commission published its expansion plan to cover up to six Western Balkan countries: Albania, Bosnia & Herzegovina, Kosovo, Former Yugoslav Republic of Macedonia, Montenegro, and Serbia. The plan envisages that all six applicants could achieve accession as members of the European Union after 2025.