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.
Balkans
Although the new government reaffirmed Serbia's intentions to fulfill its obligations as a member of the Axis, Germany, with Bulgaria, invaded both Greece and Yugoslavia. Yugoslavia immediately disintegrated when those loyal to the Serbian King and the Croatian units mutinied. Greece resisted, but, after two months of fighting, collapsed and was occupied. The two countries were partitioned between the three Axis allies, Bulgaria, Germany and Italy, and the Independent State of Croatia, a puppet state of Italy and Germany.