The crossing of the Rhine, the encirclement and reduction of the Ruhr, and the sweep to the Elbe–Mulde line and the Alps all established the final campaign on the Western Front as a showcase for Western Allied superiority over the Germans in maneuver warfare. Drawing on the experience gained during the campaign in Normandy and the Allied advance from Paris to the Rhine, the Western Allies demonstrated in western Germany and Austria their capability of absorbing the lessons of the past. By attaching mechanized infantry units to armored divisions, they created a hybrid of strength and mobility that served them well in the pursuit of warfare through Germany. Key to the effort was the logistical support that kept these forces fueled, and the determination to maintain the forward momentum at all costs. These mobile forces made great thrusts to isolate pockets of German troops, which were mopped up by additional infantry following close behind. The Western Allies rapidly eroded any remaining ability to resist.