The American defense prevented the Germans from reaching the supplies near the Belgian cities of Liège and Spa. After more than ten days of battle, they pushed the Americans out of the villages, but were unable to move them from the ridge. The V Corps of the First U.S. Army prevented the German forces from reaching the roads to their west. The 99th Infantry Division was outnumbered but it caused a lot of German dead and wounded. The division lost about 20% of its strength, including 465 killed and 2,524 evacuated due to wounds, injuries or fatigue. German losses were much higher. In the northern sector, this included more than 4,000 deaths and the destruction of sixty tanks and big guns. Historian John S.D. Eisenhower wrote, "... the action of the 2nd and 99th Divisions on the northern shoulder could be considered the most decisive of the Ardennes campaign."