The River of the Congo is a major river in Central Africa. It is also known as the Zaire River and is the second longest river in Africa. The river is fed by its tributaries, the Ebola and Ubangi Rivers. The Ebola River is a major tributary of the Congo River and is approximately 1, 100 miles long. The Ubangi River is another major tributary of the Congo River and is approximately 1, 500 miles long. Both rivers are important sources of water for the people living in the region.