The River of Champagne is a region in France that is known for its sparkling wines. It is made up of two rivers, the Marne and the SEINE, both of which are five letters long. The Marne is a tributary of the SEINE and flows through the Champagne region, while the SEINE is a major river in France that flows through Paris. Together, these two rivers form the River of Champagne, a region renowned for its sparkling wines.