Szlavónia (Slavonia): lying to the east of Zagreb between the Dráva and Száva rivers, the region today is a part of Croatia. It had been an autonomous unit within the Kingdom of Hungary, and then a military frontier zone. Land was once plentiful, and led to a great deal of population mobility. The present Hungarian-speaking population lives scattered throughout the region, and as a contiguous settlement in four villages on the right bank of the Danube.