Posavina

Posavina (Посавина) is a geographical region that stretches along the Sava river, encompassing only the inner areas of the Sava river basin, that are adjacent or near to the Sava river itself, namely catch region spanning from the Julian Alps in the northwest to the confluence with the Danube in the southeast. It passes through several countries of former Yugoslavia, namely Slovenia, Croatia, Bosnia and Herzegovina and Serbia. In Slovene, the term Posavina is not used to describe the parts of Slovenia that lie by the Sava river. Instead, the terms Posavje and Zasavje are used. Geography of the Posavina region is defined by geological features of the central (inner) zones of the Sava river basin, that are near or adjacent to the Sava river itself. The region is stretched along the Sava river, that flows from west to east, connecting valleys and plains in transitional regions between the Dinaric Mountains and the Pannonian Plain. Geographical borders of the Posavina region are defined, to the south, by northern zones of the Dinaric mountain system, while Posavina′s northern borders are defined by the Pannonian island mountains. In terms of political geography, the Posavina region is divided into: Croatian Posavina, Bosnian Posavina, and Serbian Posavina. During the Roman era, the region belonged to the province of Pannonia, marking its most southern zone. During the reign of emperor Augustus, it was the epicenter of the Pannonian Uprising. During the 5th century, the region was invaded by several migrating peoples, including Huns and Goths. In post-Roman era, during the 6th century, the region was contested between Ostrogoths, Gepids, Langobards, Avars, and the Byzantine Empire. By the end the 6th and during the 7th century, the entire region was settled by South Slavs. In 819-823, western parts of the region were center of the Ljudevit's Rebellion against the Frankish Empire. During the 11th and 12th century, almost all parts of Posavina were gradually conquered by the Kingdom of Hungary.