Moselle Rivers that form its eastern borders.
The northern third of this country is known as the "Oesling," and it is dominated by hills and low mountains, especially Kneiff Mountain near Wilwerdange, its highest point. The southern two-thirds is known as "Gutland," contains cities like Esch-sur-Alzette and Dudelange.  An abbey founded by St. Willibrord, Echternach, is located in this nation, as is the city of Vianden, which was attacked by the 5th Parachute Division during the Battle of the (*) Bulge. This nation's capital served as the headquarters of Patton's Third Army, which defeated the German attack over the Sauer, Our, and ? Moselle Rivers that form its eastern borders. For 10 points, name this nation in the Ardennes Forest between Germany, Belgium, and France.
The northern third of this country is known as the "Oesling," and it is dominated by hills and low mountains, especially Kneiff Mountain near Wilwerdange, its highest point.
{Luxembourg}