The Battle of the Bulge was fought in December of 1944 and January of 1945. In the battle, Germany committed the last of their reserves in an attempt to smash through the American forces in the Ardennes forces in Europe. The goal was to drive all the way to Antwerp and split the British and American forces in two.
Armed with their formidable Tiger and Panther tanks, the Germans were initially very successful in the opening days of the offensive and caught the Americans completely off guard. Several American pockets of soldiers became isolated and cut off, and were forced to fight on their own against numerically superior German forces.
Eventually, the Germans’ fuel supplies began to run out, and American reinforcements begin to arrive en masse. The Germans were then pushed back to their original starting lines within a month. The battle was a severe blow to Germany, which fell far short of its objectives and had wasted the last of its reserves. The battle was also the bloodiest battle the Americans fought in World War II. Total American casualties were nearly 90,000, while the Germans lost anywhere from 65,000 to 100,000 depending on estimates.