Prevlaka

Prevlaka is a small peninsula in southern Croatia, near the border with Montenegro, at the entrance to the Bay of Kotor on the eastern Adriatic coast.

Because of its strategic location in the southern Adriatic, in the aftermath of the SFR Yugoslav breakup, the peninsula became subject to a territorial dispute between Croatia and FR Yugoslavia, a federal state that included Montenegro. The territory was functional under UN until 2002. The UN mission ended in December 2002 and the territory that had previously been part of SR Croatia was returned to the Republic of Croatia. An agreement was signed by both sides five days before the departure of the UNMOP that demilitarized Prevlaka and effectively made it a neutral territory, though implementation still has a temporary character.

Source: Wikipedia