The Most important river for Eastern Europes transportation is the Danube River.
Danube
Europe's eastern boundary is formed by the Caspian Sea, Ural River and Ural Mountains. The border also runs through the countries of Russia and Turkey.
the volga is the longest river of one name entirely within eastern Europe tho the combined ob irtysh is longer but partly outside Europe so it depends on what you will accept
The Ural Mountains, The Ural River, and the Caspian Sea
the Mississippi river
The Danube River.
Danube,seine.
One of the major rivers in Europe is the Rhone. It winds through Switzerland and France, then empties into the Mediterranean Sea. Another major River in Europe is the Dnieper River. The Dnieper flows through Russia, Belarus, and Ukraine.
The Ural Mountains that run through Russia and the Ural River, which flows from Russia, through Kazakhstan to the Caspian Sea.
neuseri river
The river Danube (Dunărea in Romanian language)
It is the second longest river in Europe. It flows through 10 different countries. It flows through many major cities including 4 capital cities.