Query: What were the names of the first two rivers France aggressively went to while expanding eastward?
Context: Holy Roman Empire central power had begun to decline following years of imperial adventures in Italian lands, often ceding hegemony in Western Europe to France, which had long since centralized power. France began an aggressive policy of expanding eastward, first to the rivers Rhône and Meuse, and when those borders were reached, aiming for the Rhine. In 1299, the French proposed a marriage alliance between Philip IV of France's sister Blanche and Albert I of Germany's son Rudolf, with Alsace to be the dowry; however, the deal never came off.