This river's bridge at Arnhem was the site of the failed Operation Market Garden of World War II, which occurred downstream of cities such as Basel, Worms, Speyer, and Rotterdam.  
When painting Washington Crossing the Delaware, Emmanuel Leutze modeled the Delaware River after this river, which was effectively made an international waterway by the 1831 Mannheim Convention.  With a length of about 800 miles, it passes through numerous countries, and one national capital.  This river's bridge at Arnhem was the site of the failed Operation Market Garden of World War II, which occurred downstream of cities such as Basel, Worms, Speyer, and Rotterdam.  For 10 points, name this major river of Western Europe that starts in the Alps and ends in three distributaries in the Netherlands.
When painting Washington Crossing the Delaware, Emmanuel Leutze modeled the Delaware River after this river, which was effectively made an international waterway by the 1831 Mannheim Convention.  
The {Rhine}