The medieval state borders have been a matter of huge debate and will remain so until new historical evidence is found. However there is some factual information. Medieval Croatia incorporated Lower Pannonia (also ruled by Slavs). The river Cetina was a major border in the south. The [[Dalmatian Italians#Early History|Roman cities]] of '''Jadera''' (Zara/Zadar), '''Spalatum''' (Spalato/Split), '''Ragusa''' (Dubrovnik) and '''Trau''' (Trogir) with their surrounding areas never became part of the state other than for a short period under Peter Kresimir IV. Other parts of the Dalmatian coast did. At times in the north the river Sava was a major border (Lower Pannonia). The region south of the river Cetina has been sometimes historically referred to as Red Croatia,<ref>[http://books.google.com.au/books?id=wEF5oN5erE0C&pg=PA62&dq=V.+Klaić+Red+Croatia+John+Fine&hl=en&sa=X&ei=8RbkUN3YJ4iZkAW4lIGIAw&sqi=2&ved=0CDMQ6AEwAA#v=onepage&q=V.%20Klaić%20Red%20Croatia%20John%20Fine&f=false When Ethnicity Did not Matter in the Balkans:] by John Van Antwerp Fine. (p62-p63) | The medieval state borders have been a matter of huge debate and will remain so until new historical evidence is found. However there is some factual information. Medieval Croatia incorporated Lower Pannonia (also ruled by Slavs). The river Cetina was a major border in the south. The [[Dalmatian Italians#Early History|Roman cities]] of '''Jadera''' (Zara/Zadar), '''Spalatum''' (Spalato/Split), '''Ragusa''' (Dubrovnik) and '''Trau''' (Trogir) with their surrounding areas never became part of the state other than for a short period under Peter Kresimir IV. Other parts of the Dalmatian coast did. At times in the north the river Sava was a major border (Lower Pannonia). The region south of the river Cetina has been sometimes historically referred to as Red Croatia,<ref>[http://books.google.com.au/books?id=wEF5oN5erE0C&pg=PA62&dq=V.+Klaić+Red+Croatia+John+Fine&hl=en&sa=X&ei=8RbkUN3YJ4iZkAW4lIGIAw&sqi=2&ved=0CDMQ6AEwAA#v=onepage&q=V.%20Klaić%20Red%20Croatia%20John%20Fine&f=false When Ethnicity Did not Matter in the Balkans:] by John Van Antwerp Fine. (p62-p63) |