I
River, Serbia, Serbia and Montenegro.
Formed by the confluence of the South (Južna) Morava and West (Zapadna) Morava rivers, it flows north to enter the Danube River , after a course of 137 mi (221 km). The total area of the Morava River basin is 14,457 sq mi (37,444 sq km), corresponding almost to the political definition of Serbia .
II
German March
River, eastern Czech Republic.
It rises in mountains and flows south to enter the Danube River just above Bratislava , Slovakia, after a course of 227 mi (365 km). In its lower course it first divides the Czech Republic from Slovakia and then divides Slovakia from Austria. It gives its name to Moravia , the area around it.