The name
Slavonia originated in the
Early Middle Ages. The area was named after the
Slavs who settled there and called themselves *Slověne. The root *Slověn- appeared in various dialects of
languages spoken by people inhabiting the area west of the
Sutla river, as well as between the
Sava and
Drava rivers—
South Slavs living in the area of the former
Illyricum. The area bounded by those rivers was called *Slověnьje in the
Proto-Slavic language. The word subsequently evolved to its various present forms in the
Slavic languages, and other languages adopted the term.
Prehistory and antiquity Remnants of several
Neolithic and
Chalcolithic cultures were found in all regions of Croatia, but most of the sites are found in the river valleys of northern Croatia, including Slavonia. The most significant cultures whose presence was found include the
Starčevo culture whose finds were discovered near
Slavonski Brod and
dated to 6100–5200
BC, the
Vučedol culture, the
Baden culture and the
Kostolac culture. Most finds attributed to the Baden and Vučedol cultures are discovered in the area near the right bank of the Danube near
Vukovar,
Vinkovci and
Osijek. The Baden culture sites in Slavonia are dated to 3600–3300 BC, and Vučedol culture finds are dated to 3000–2500 BC. The
Iron Age left traces of the early
Illyrian Hallstatt culture and the
Celtic La Tène culture. Much later, the region was settled by Illyrians and other tribes, including the
Pannonians, who controlled much of present-day Slavonia. Even though archaeological finds of Illyrian settlements are much sparser than in areas closer to the
Adriatic Sea, significant discoveries, for instance in
Kaptol near
Požega have been made. The Pannonians first came into contact with the
Roman Republic in 35 BC, when the Romans conquered Segestica, or modern-day
Sisak. The conquest was completed in 11 BC, when the
Roman province of Illyricum was established, encompassing modern-day Slavonia as well as a vast territory on the right bank of Danube. The province was renamed Pannonia and divided within two decades.
Middle Ages After the collapse of the
Western Roman Empire, which included the territory occupied by modern-day Slavonia, the area became a part of the
Ostrogothic Kingdom by the end of the 5th century. However, control of the area proved a significant task, and
Lombards were given increasing control of Pannonia in the 6th century, which ended in their withdrawal in 568 and the arrival of
Pannonian Avars and Slavs, who established control of Pannonia by the year 582. After the fall of the Avar Khaganate at the beginning of the 9th century, in
Lower Pannonia there was a principality, governed by Slavic rulers who were vassals of
Francs. The
invasion of the Hungarian tribes overwhelmed this state. The eastern part of Slavonia in the 9th century may have been ruled by
Bulgars. The first king of Croatia
Tomislav defeated Hungarian and
Bulgarian invasions and spread the influence of Croatian kings northward to Slavonia. The medieval Croatian kingdom reached its peak in the 11th century during the reigns of
Petar Krešimir IV (1058–1074) and
Dmitar Zvonimir (1075–1089). When
Stjepan II died in 1091, ending the
Trpimirović dynasty,
Ladislaus I of Hungary claimed the Croatian crown. Opposition to the claim led to a
war and
personal union of Croatia and Hungary in 1102, ruled by
Coloman. In the 2nd half of the 12th century, Croatia and the territory between the Drava and the Sava were governed by the
ban of all Slavonia, appointed by the king. From the 13th century, a separate ban governed parts of present-day
central Croatia, western Slavonia, and northwestern
Bosnia and Herzegovina, an area where a new entity emerged named Kingdom of Slavonia (), while modern-day eastern Slavonia was a part of Hungary. Croatia and Slavonia were in 1476 united under the same
ban (
viceroy), but kept separate parliaments until 1558. The
Ottoman conquests in Croatia led to the 1493
Battle of Krbava field and 1526
Battle of Mohács, both ending in decisive Ottoman victories. King
Louis II of Hungary died at Mohács, and
Ferdinand I of the
House of Habsburg was
elected in 1527 as the new ruler of Croatia, under the condition that he provide protection to Croatia against the Ottoman Empire, while respecting its political rights. The period saw the rise to prominence of a native nobility such as the
Frankopans and the
Šubićs, and ultimately to numerous
bans from the two families. The present coat of arms of Slavonia, used in an official capacity as a part of the
coat of arms of Croatia, dates from this period—it was granted to Slavonia by king
Vladislaus II Jagiellon on 8 December 1496.
Ottoman conquest led a revolt against Ottomans in Požega. Following the Battle of Mohács, the Ottomans expanded their possessions in Slavonia seizing
Đakovo in 1536 and Požega in 1537, defeating a Habsburg army led by
Johann Katzianer, who was attempting to retake Slavonia, at
Gorjani in September 1537. By 1540, Osijek was also under firm control of the Ottomans, and regular administration in Slavonia was introduced by establishing the
Sanjak of Pojega. The Ottoman control in Slavonia expanded as
Novska surrendered the same year. Turkish conquest continued—
Našice were seized in 1541,
Orahovica and
Slatina in 1542, and in 1543,
Voćin,
Sirač and, after a 40-day siege,
Valpovo. In 1544, Ottoman forces conquered
Pakrac. Lessening hostilities brought about a five-year truce in 1547 and temporary stabilization of the border between Habsburg and Ottoman empires, with
Virovitica becoming the most significant defensive Habsburg fortress and Požega the most significant Ottoman centre in Slavonia, as Ottoman advances to Sisak and
Čazma were made, including a brief occupation of the cities. Further westward efforts of the
Turkish forces presented a significant threat to
Zagreb and the rest of Croatia and the Hungarian kingdom, prompting a greater defensive commitment by the
Habsburg Monarchy. One year after the 1547 truce ended,
Ivan Lenković devised a system of fortifications and troops in the border areas, a forerunner of the
Croatian Military Frontier. Nonetheless, in 1552, the Ottoman conquest of Slavonia was completed when Virovitica was captured. Ottoman advances in the Croatian territory continued until the 1593
Battle of Sisak, the first decisive Ottoman defeat, and a more lasting stabilisation of the frontier. During the
Great Turkish War (1683–1698), Slavonia was regained in between 1684 and 1691 when the Ottomans abandoned the region—unlike western
Bosnia, which had been part of Croatia before the
Ottoman conquest. is a heraldic symbol of Slavonia, representing the historical region's coat of arms. It depicts a marten running on a red field between two wavy white lines, all on a blue background with a star on top The
Ottoman wars instigated great demographic changes. Croats migrated towards
Austria and the present-day
Burgenland Croats are direct descendants of these settlers. By the end of Turkish rule, Muslims accounted for almost half of Slavonia's indigenous population, being primarily Croats and immigrants from Bosnia and Serbia rather than Turks or Arabs. In the second half of the 16th century
Vlachs from Slavonia were no longer an exclusive part of population because the Vlach privileges were attractive for many non-Vlachs who mixed with the Vlachs in order to get their status. To replace the fleeing Croats, the Habsburgs called on the
Orthodox populations of
Bosnia and
Serbia to provide military service in the Croatian Military Frontier. Serb migration into this region peaked during the
Great Serb Migrations of 1690 and 1737–39. The greatest Serb concentrations were in the eastern Slavonia, and
Sremski Karlovci became the see of
Serbian Orthodox metropolitans. Part of the colonists came to Slavonia from area south of the
Sava, especially from the
Soli and
Usora areas, continuing the process which already started after 1521. At beginning of the 17th century it seems that there was a new wave of colonization, about 10,000 families which are assumed to come from
Sanjak of Klis or with less possibility from area of
Sanjak of Bosnia.
Habsburg Monarchy and Austria-Hungary of
Pejačević family in
Našice The areas acquired through the
Treaty of Karlowitz were assigned to Croatia, itself in the union with Hungary and the union ruled by the Habsburgs. The border area along the
Una, Sava and Danube rivers became the
Slavonian Military Frontier. At this time, Osijek took over the role of the administrative and military centre of the newly formed
Kingdom of Slavonia from Požega. During the
Hungarian Revolution of 1848 Croatia sided with the Austrians, Ban
Josip Jelačić helping to defeat the Hungarian forces in 1849, and ushering in a period of
Germanization policy. By the 1860s, failure of the policy became apparent, leading to the
Austro-Hungarian Compromise of 1867 and creation of a
personal union between the crowns of the
Austrian Empire and the
Kingdom of Hungary. The treaty left the issue of Croatia's status to Hungary as a part of
Transleithania—and the status was resolved by the
Croatian–Hungarian Settlement of 1868, when the kingdoms of Croatia and Slavonia were united as the
Kingdom of Croatia-Slavonia. After
Austria-Hungary occupied
Bosnia and Herzegovina following the
1878 Treaty of Berlin, the Military Frontiers were abolished and the Croatian and Slavonian Military Frontier territory returned to Croatia-Slavonia in 1881, At that time, the easternmost point of Croatia-Slavonia became
Zemun, as all of
Syrmia was encompassed by the kingdom. On 29 October 1918, the Croatian Sabor declared independence and decided to join the newly formed
State of Slovenes, Croats and Serbs, The
Treaty of Trianon was signed in 1920, at the end of
World War I, between the
Allies of World War I and
Hungary as one of the successor states to Austria-Hungary. The treaty established the southern border of Hungary along the Drava and
Mura rivers, except in
Baranya, where only the northern part of the county was kept by Hungary. The territorial acquisition in Baranya was not made a part of Slavonia, even though adjacent to Osijek, because pre-1918 administrative divisions were disestablished by the new kingdom. The political situation in the new kingdom deteriorated, leading to the
dictatorship of King
Alexander in January 1929. The dictatorship formally ended in 1931 when the king imposed a more unitarian constitution transferring executive power to the king, and changed the name of the country to Yugoslavia. The
Cvetković–Maček Agreement of August 1939 created the autonomous
Banovina of Croatia incorporating Slavonia. Pursuant to the agreement, the Yugoslav government retained control of defence, internal security, foreign affairs, trade, and transport while other matters were left to the Croatian Sabor and a crown-appointed 'Ban'. In April 1941,
Yugoslavia was occupied by
Germany and
Italy. Following the invasion the territory of Slavonia was incorporated into the
Independent State of Croatia, a Nazi-backed
puppet state and assigned as a zone under German occupation for the duration of
World War II. The regime introduced
anti-semitic laws and conducted a campaign of ethnic cleansing and
genocide against Serb and
Roma populations, exemplified by the
Jasenovac and
Stara Gradiška concentration camps, but to a much lesser extent in Slavonia than in other regions, due to strategic interests of the Axis in keeping peace in the area. The largest
massacre occurred in 1942 in
Voćin. Armed resistance soon developed in the region, and by 1942, the
Yugoslav Partisans controlled substantial territories, especially in mountainous parts of Slavonia. The Serbian royalist
Chetniks, who carried out
genocide against Croat civilian population, struggled to establish a significant presence in Slavonia throughout the war. After the war, the new Yugoslav government interned local
Germans in camps in Slavonia, the largest of which were in
Valpovo and Krndija, where many died of hunger and diseases.
Federal Yugoslavia and the independence of Croatia . After World War II, Croatia—including Slavonia—became a
single-party Socialist federal unit of the
Socialist Federal Republic of Yugoslavia, ruled by the
Communists, but enjoying a degree of autonomy within the federation. The autonomy effectively increased after the
1974 Yugoslav Constitution, basically fulfilling a goal of the
Croatian Spring movement, and providing a legal basis for independence of the federative constituents. In 1947, when all borders of the former Yugoslav constituent republics had been defined by demarcation commissions, pursuant to decisions of the
AVNOJ of 1943 and 1945, the federal organization of
Yugoslav Baranya was defined as Croatian territory allowing its integration with Slavonia. The commissions also set up the present-day border between Serbia and Croatia in Syrmia, and along the
Danube River between
Ilok and mouth of the Drava and further north to the Hungarian border, the section south of confluence of the Drava matching the border between the
Kingdom of Croatia-Slavonia and the
Bács-Bodrog County that existed until 1918 and the end of World War I. The
1964 Slavonia earthquake caused widespread devastation and several human casualties. A large area of the region entered a period of several years of reconstruction afterwards. In the 1980s the political situation in Yugoslavia deteriorated with national tension fanned by the 1986 Serbian
SANU Memorandum and the
1989 coups in Vojvodina, Kosovo and Montenegro. In January 1990, the
Communist Party fragmented along national lines, with the Croatian
faction demanding a looser federation. In the same year, the
first multi-party elections were held in Croatia, with
Franjo Tuđman's win raising nationalist tensions further. The
Serbs in Croatia, intent on achieving independence from Croatia, left the Sabor and declared the autonomy of areas that would soon become the unrecognized self-declared
Republic of Serbian Krajina (RSK). As tensions rose, Croatia
declared independence in June 1991; however the declaration came into effect on 8 October 1991. Tensions escalated into the
Croatian War of Independence when the
Yugoslav National Army and various Serb
paramilitaries attacked Croatia. By the end of 1991, a high intensity war fought along a wide front reduced Croatia to controlling about two-thirds of its territory. memorial cemetery In Slavonia, the first armed conflicts were clashes in
Pakrac, and
Borovo Selo near Vukovar.
Western Slavonia was occupied in August 1991, following an advance by the
Yugoslav forces north from
Banja Luka across the Sava River. This was partially pushed back by the
Croatian Army in operations named
Otkos 10, Armed conflict in the
eastern Slavonia, culminating in the
Battle of Vukovar and a subsequent
massacre, also included heavy fighting and the successful defence of Osijek and Vinkovci. The front line stabilized and a ceasefire was agreed to on 2 January 1992, coming into force the next day. After the ceasefire,
United Nations Protection Force was deployed to the occupied areas, but intermittent artillery and rocket attacks, launched from
Serb-held areas of Bosnia, continued in several areas of Slavonia, especially in Slavonski Brod and
Županja. The war effectively ended in 1995 with Croatia achieving a
decisive victory over the RSK in August 1995. The remaining occupied areas—eastern Slavonia—were restored to Croatia pursuant to the
Erdut Agreement of November 1995, with the process concluded in mid-January 1998. After the war, a number of towns and municipalities in the region were designated
Areas of Special State Concern. ==Geography==