Nazi-annexed Austria Hungary Fascist Italy Independent State of Croatia
During World War II, Nazi Germany and Hungary annexed northern areas (brown and dark green areas, respectively), while Fascist Italy annexed the vertically hashed black area (solid black western part being annexed by Italy already with the Treaty of Rapallo). Some villages were incorporated into the Independent State of Croatia. After 1943, Germany took over the Italian occupational area, as well.

Traditional regions of Slovenia

1 Slovene Littoral; Carniola: 2a Upper 2b Inner, 2c Lower 3 Carinthia; 4 Styria; 5 Prekmurje

– in Europe (green & dark grey)
– in the European Union (green)

Slovenia (ⁱ/sloʊˈviːniə, slə-, -njə/sloh-VEE-nee-ə; Slovene: Slovenija [slɔˈʋéːnija]), officially the Republic of Slovenia (Slovene: Republika Slovenija ,abbr.: RS), is a nation state in southern Central Europe, located at the crossroads of main European cultural and trade routes. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and the Adriatic Sea to the southwest. It covers 20,273 square kilometers (7,827 sq mi) and has a population of 2.06 million. It is a parliamentary republic and a member of the United Nations, European Union, and NATO. The capital and largest city is Ljubljana.