Syrmia in the context of "Novi Sad"

Vojvodina (Serbian: Војводина, IPA: [vǒjvodina], VOY-və-DEE-nə), officially the Autonomous Province of Vojvodina (Serbian: Аутономна Покрајина Војводина, romanized: Autonomna Pokrajina Vojvodina), is an autonomous province in northern Serbia. It encompasses the historical and geographical regions of Bačka, Banat, Syrmia, and northernmost part of Mačva, lying to the north of the national capital Belgrade and the Sava and Danube rivers. Vojvodina has 1.7 million inhabitants, about a quarter of the country's population, and its administrative centre, Novi Sad, is the second largest city in Serbia.

The Vučedol culture (Croatian: Vučedolska kultura) flourished between 3000 and 2200 BC (the Chalcolithic period of earliest copper-smithing and arsenical bronze-smithing), centered in Syrmia and eastern Slavonia on the right bank of the Danube river, but possibly spreading throughout the Pannonian plain and western Balkans and southward. It was thus contemporary with the Sumer period in Mesopotamia, the Early Dynastic period in Egypt and the earliest settlements of Troy (Troy I and II). Archaeogenetics link the culture from Yamnaya migrations directly from the steppes that mixed with Neolithic people. The need for copper resulted in the expansion of the Vucedol Culture from its homeland of Slavonia into the broader region of central and southeastern Europe. The Vučedol culture is also known as the 'Zok culture' in Hungary, with regional variants including the 'Mako culture' and 'Nyirseg culture', and as the 'Laibach-Ljubljana culture' In the eastern Alpine area.

Bačka (Serbian: Бачка, pronounced [bâːtʃkaː]) or Bácska (pronounced [ˈbaːtʃkɒ]), 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 administrative center 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.

The Treaty of Passarowitz, or Treaty of Požarevac, was the peace treaty signed in Požarevac (Serbian Cyrillic: Пожаревац, German: Passarowitz, Turkish: Pasarofça), a town that was in the Ottoman Empire but is now in Serbia, on 21 July 1718 between the Ottoman Empire and its adversaries, the Habsburg monarchy and the Republic of Venice.

The treaty saw the cession of several Ottoman territories to the Habsburgs, and it was regarded in its time as an extraordinary success and source of pride in Vienna. The treaty marked the end of Ottoman occupation within the Kingdom of Hungary with the cession of Belgrade, Syrmia and the Eyalet of Temesvár.

The South Bačka District (Serbian: Јужнобачки округ, romanized: Južnobački okrug, pronounced [jûʒnobâːtʃkiː ôkruːɡ]) is one of administrative districts of Serbia. It lies in the southern part of Bačka and northern part of Syrmia. According to the 2022 census, the South Bačka District has a population of 607,178 inhabitants. The administrative center of the district is the city of Novi Sad, which is also the administrative center and the largest city of the Vojvodina.

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.

Sirmium was a city in the Roman province of Pannonia, located on the Sava river, on the site of modern Sremska Mitrovica in the Vojvodina autonomous province of Serbia. First mentioned in the 4th century BC and originally inhabited by Illyrians and Celts, it was conquered by the Romans in the 1st century BC and subsequently became the capital of the Roman province of Pannonia Inferior. In 293 AD, Sirmium was proclaimed one of the four capitals of the Roman Empire. It was also the capital of the Praetorian prefecture of Illyricum and of Pannonia Secunda. The site is protected as an archaeological Site of Exceptional Importance. The modern region of Syrmia (Srem or Srijem) was named after the city.

Sirmium purportedly had 100,000 inhabitants and was one of the largest cities of its time. Colin McEvedy, whose estimates for ancient cities are much lower than the general consensus, put the population at only 7,000, based on the size of the archaeological site. The amount of grain imported between 1 AD and 400 AD was enough to feed 700,000 to 1 million people.

A Byzantine–Hungarian War was fought between Byzantine and Hungarian forces in the Balkans from 1180 to 1185. Taking advantage of the internal conflicts in the Byzantine Empire after Emperor Manuel's death, Béla III of Hungary reoccupied Croatia, Dalmatia and Syrmia, restoring Hungarian suzerainty over these territories after fourteen years.