Vis is a small Croatian island in the Adriatic Sea. It is the farthest inhabited island off the Croatian mainland. Before the end of World War I, the island was held by the Liburnians, the Republic of Venice, the Napoleonic Kingdom of Italy, and the Austrian Empire. During the 19th century, the sea to the north of Vis was the site of two naval battles. In 1920, the island was ceded to the Kingdom of Yugoslavia as part of the Treaty of Rapallo. During World War II, the island was the headquarters of the Yugoslav Partisan movement. After the war, Vis was used as a naval base for the Yugoslav People's Army until 1989. The island's main industries are viticulture, fishing, fish processing, and tourism.

Croatia, officially the Republic of Croatia, is a country located at the crossroads of Central and Southeast Europe. Its coast lies entirely on the Adriatic Sea. Croatia borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herzegovina and Montenegro to the southeast, and shares a maritime border with Italy to the west. Its capital and largest city, Zagreb, forms one of the country's primary subdivisions, with twenty counties. Other major urban centers include Split, Rijeka and Osijek. The country spans 56,594 square kilometres, and has a population of nearly 3.9 million.