Slavonia 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 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.
Vojvodina, officially the Autonomous Province of Vojvodina, is an autonomous province that occupies the northernmost part of Serbia, located in Central Europe. It lies within the Pannonian Basin, bordered to the south by the national capital Belgrade and the Sava and Danube Rivers. The administrative centre, Novi Sad, is the second-largest city in Serbia.
Vukovar-Srijem County, Vukovar-Sirmium County or Vukovar-Syrmia County, named after the eponymous town of Vukovar and the region of Syrmia, is the easternmost Croatian county. It includes the eastern parts of the region of Slavonia and the western parts of the region of Syrmia, as well as the lower Sava river basin, Posavina and Danube river basin Podunavlje. Due to the overlapping definitions of geographic regions, division on Slavonia and Syrmia approximately divides the county vertically into north-west and south-east half, while division on Posavina and Podunavlje divides it horizontally on north-east and south-west half.
Syrmia is a region of the southern Pannonian Plain, which lies between the Danube and Sava rivers. It is divided between Serbia and Croatia. Most of the region is flat, with the exception of the low Fruška gora mountain stretching along the Danube in its northern part.
Bačka or Bácska is a geographical and historical area within the Pannonian Plain bordered by the river Danube to the west and south, and by the river Tisza to the east. It is divided between Serbia and Hungary. Most of the area is located within the Vojvodina region in Serbia and Novi Sad, the capital of Vojvodina, lies on the border between Bačka and Syrmia. The smaller northern part of the geographical area is located within Bács-Kiskun County in Hungary.
Danube Banovina or Danube Banate, was a banovina of the Kingdom of Yugoslavia between 1929 and 1941. This province consisted of the geographical regions of Syrmia, Bačka, Banat, Baranya, Šumadija, and Braničevo. The capital city of the Danube Banovina was Novi Sad. The province was named after the Danube River.
The Serbian Autonomous Oblast of Eastern Slavonia, Baranja and Western Syrmia was a self-proclaimed Serbian Autonomous Oblast (SAO) in eastern Croatia, established during the Yugoslav Wars. It was one of three SAOs proclaimed on the territory of Croatia. The oblast included parts of the geographical regions of Slavonia, Baranja, and Syrmia along the Croatian section of the Danube river Podunavlje region.
Beočin is a town and municipality located in the South Bačka District of the autonomous province of Vojvodina, Serbia. The population of the town is 7,839, whilst Beočin's municipality population is 15,726. There is also a Beočin Monastery from the 16th century in the municipality.
Baranya or Baranja is a geographical and historical region between the Danube and the Drava rivers located in the Pannonian Plain. Its territory is divided between Hungary and Croatia. In Hungary, the region is included in Baranya county, while in Croatia, it is part of Osijek-Baranja county.
Vojvodina is an autonomous province located in northern Serbia. It consists of the Pannonian Plain in the south, and the Danube and Sava rivers in the north.
The Serbs of Vojvodina are the largest ethnic group in this northern province of Serbia. For centuries, Vojvodina was ruled by several European powers, but Vojvodina Serbs never assimilated into cultures of those countries. Thus, they have consistently been a recognized indigenous ethnic minority with its own culture, language and religion. According to the 2022 census, there were 1,190,785 Serbs in Vojvodina or 68.43% of the population of the province.
Ilok is the easternmost town in Croatia forming a geographic salient surrounded by Vojvodina. Located in the Syrmia region, it lies on the Fruška Gora hill overlooking the Danube river, which forms the border with the Bačka region of Serbia. The town is home to a Franciscan monastery and Ilok Castle, which is a popular day trip for domestic and cross-border tourists.
Yugoslavia had various administrative divisions throughout its 74 years of existence.
Yugoslavia was a state concept among the South Slavic intelligentsia and later popular masses from the 19th to early 20th centuries that culminated in its realization after the 1918 collapse of Austria-Hungary at the end of World War I and the formation of the Kingdom of Serbs, Croats and Slovenes. However, the kingdom was better known colloquially as Yugoslavia ; in 1929 it was formally renamed the "Kingdom of Yugoslavia".
The subdivisions of the Kingdom of Yugoslavia existed successively in three different forms. From 1918 to 1922, the Kingdom of Yugoslavia maintained the pre-World War I subdivisions of Yugoslavia's predecessor states. In 1922, the state was divided into 33 oblasts or provinces and, in 1929, a new system of nine banates was implemented.
Eastern Slavonia, Baranja and Western Syrmia, commonly abbreviated as Eastern Slavonia, was a short-lived Serb parallel entity in the territory of Croatia along the Danube river.
This is a list of historical administrative divisions of Serbia since the establishment of the Principality of Serbia until today.
Belgrade Oblast was one of the oblasts of the Kingdom of Serbs, Croats and Slovenes from 1922 to 1929. Its administrative center was Belgrade.
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 centerline of the river represents 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 km2.
Vukovar resolution was the document in which Serbs from Vukovar and neighboring communities, at the end of 1939, requested from central Yugoslav government exemption of Vukovar county from the Banovina of Croatia and its annexation to the Danube Banovina or future Banovina of Serbia.
