In
Late antiquity, between the 3rd and 5th centuries, the city of
Sirmium (present-day
Sremska Mitrovica) was a capital of the
Roman province of
Pannonia Secunda. In the 6th century Sirmium was the capital of
Byzantine Pannonia. In the 7th century, during
Avar administration, the area was ruled by
Bulgar local ruler
Kuber, while in the 11th century, it was ruled by independent
Bulgarian-
Slavic duke
Sermon. In the 11th century, it was part of the Byzantine
Theme of Sirmium. During the administration of the medieval
Kingdom of Hungary (12th–16th century), the area was divided between
Sirmiensis and
Valkoensis counties. During
Ottoman administration (16th–18th century), the area was initially a part of the vassal Ottoman duchy of Syrmia ruled by Serb duke
Radoslav Čelnik and was subsequently included into the
Sanjak of Syrmia. At the end of the Austro-Russian-Turkish War of 1735–1739, there was a migration of Albanians from the Kelmendi tribe to Srem, who were recorded as speaking Albanian as late as 1921. During
Habsburg administration (18th-19th century), the area was divided between the
Syrmia County and the
Military Frontier. In the 1850s, northern parts of the area were part of the
Novi Sad District, but were again included into Syrmia County after 1860. Since the abolishment of the
Military Frontier in 1882, Syrmian parts of the Frontier were also included into Syrmia County. During the royal
Serb-Croat-Slovene (
Yugoslav) administration (1918–1941), the area was part of the
Syrmia County (1918–1922) and
Syrmia Oblast (1922–1929). From 1929 to 1931, the area was divided between
Danube Banovina in the north-east and
Drina Banovina in the south-west, while from 1931 to 1939 the area was part of the
Danube Banovina. From 1939 to 1941, north-western parts of the area were part of the
Banovina of Croatia. During the
German-
Croatian Axis occupation (1941–1944), the area was included into the
Grand County of Vuka. Since 1944, the area was part of autonomous
Yugoslav Vojvodina (which was part of newly established
Socialist Republic of Serbia since 1945). The present-day
administrative districts of Serbia (including Srem District) were established in 1992 by the decree of the
Government of Serbia. ==Cities and municipalities==