Baranya (region) in the context of "Invasion of Yugoslavia"

Banat, Bačka, and Baranya (Serbo-Croatian: Banat, Bačka i Baranja / Банат, Бачка и Барања) was a province of the Kingdom of Serbia and the Kingdom of Serbs, Croats, and Slovenes between November 1918 and 1922. It included the geographical regions of Banat, Bačka, and Baranya and its administrative center was Novi Sad. They were later separated from the country to become SAP Vojvodina in 1945 with the creation of Federal Yugoslavia; smaller parts of Baranya were incorporated into Croatia or ceded to Kingdom of Hungary, while a portion of Banat was ceded to Kingdom of Romania.

Hungarians are a recognized ethnic minority in Croatia. According to the 2011 census there are 14,048 people of Hungarian ethnicity living in Croatia (or 0.33% of total population). Around two thirds of them (8,249) live in Osijek-Baranja County in eastern Croatia, especially in the Croatian part of the Baranya region which borders Hungary to the north. There are also small Hungarian communities in other parts of the country, including areas in Bjelovar-Bilogora County in central Croatia where 881 people identify themselves as Hungarian.

The Serbian Vojvodina (Serbian: Српска Војводина, romanized: Srpska Vojvodina) was a short-lived self-proclaimed autonomous province within the Austrian Empire during the Revolutions of 1848, which existed until 1849 when it was transformed into the new (official) Austrian province named Voivodeship of Serbia and Temes Banat. It was created and led by political leaders of Serbs in regions of Syrmia, Banat, Bačka and Baranja. The Serbian Vojvodina gave its name to the present Vojvodina autonomous region in Serbia.

Slavonia (/sləˈvoʊniə/; Croatian: Slavonija) is, with Dalmatia, Croatia proper, and Istria, one of the four historical regions of Croatia. Located in the Pannonian Plain and taking up the east of the country, it roughly corresponds with five Croatian counties: Brod-Posavina, Osijek-Baranja, Požega-Slavonia, Virovitica-Podravina, and Vukovar-Syrmia, although the territory of the counties includes Baranya, and the definition of the western extent of Slavonia as a region varies. The counties cover 12,556 square kilometres (4,848 square miles) or 22.2% of Croatia, inhabited by 806,192—18.8% of Croatia's population. The largest city in the region is Osijek, followed by Slavonski Brod and Vinkovci.

Slavonia is located in the Pannonian Basin, largely bordered by the Danube, Drava, and Sava rivers. In the west, the region consists of the Sava and Drava valleys and the mountains surrounding the Požega Valley, and plains in the east. Slavonia enjoys a moderate continental climate with relatively low precipitation.

The border between Croatia and Serbia in the area of the Danube is disputed, an important part of their broader diplomatic relations. While Serbia claims that the thalweg of the Danube valley and the centreline of the river represent the international border between the two countries, Croatia disagrees, claiming that the international border lies along the boundaries of the cadastral municipalities located along the river—departing from the course at several points along a 140-kilometre (87 mi) section. The cadastre-based boundary reflects the course of the Danube which existed in the 19th century, before anti-meandering and hydrotechnical engineering works altered its course. The area size of the territory in dispute is reported variously, up to 140 km (54 square miles).

The dispute first arose in 1947, but was left unresolved during the existence of the Socialist Federal Republic of Yugoslavia. After the breakup of Yugoslavia, the dispute would become a contentious issue. Particular prominence was given to the dispute at the time of Croatia's accession to the European Union. The dispute remains unresolved, and the line of control mostly corresponds to Serbia's claim.

Though the Republic of Croatia administratively consists of twenty counties, it is traditionally divided into four historical and cultural regions: Croatia proper, Dalmatia, Istria, and Slavonia. These are further divided into other, smaller regions.

Osijek-Baranja County (pronounced [ôsijeːk bǎraɲa], Croatian: Osječko-baranjska županija, Hungarian: Eszék-Baranya megye) is a county in Croatia, located in northeastern Slavonia and Baranja which is defined part of the Pannonian Plain. Its center is Osijek. Other towns include Đakovo, Našice, Valpovo, Belišće, and Beli Manastir.

Baranya (Hungarian: Baranya vármegye, pronounced [ˈbɒrɒɲɒ ˈvaːrmɛɟɛ]; German: Branau; Croatian: Baranjska županija) is a county (vármegye) in southern Hungary. It is part of the Southern Transdanubia statistical region and the historical Baranya region, which was a county (comitatus) in the Kingdom of Hungary dating back to the 11th century. Its current status as one of the 19 counties of Hungary was established in 1950 as part of wider Soviet administrative territorial reform following World War II. Its county seat and largest city is Pécs.

As of 2025, it has a population of 351,158. Of the 19 counties of Hungary (excluding Budapest), it is ranked 10th, both in terms of geographic area and population.