December 16, 1944-January 28, 1945
In December 1944, in an all-out gamble to compel the Allies to sue for peace, Adolf Hitler ordered the only major German counteroffensive of the war in northwest Europe. Its objective was to split the Allied armies by means of a surprise blitzkrieg thrust through the Ardennes to Antwerp, marking a repeat of what the Germans had done three times previously–in September 1870, August 1914, and May 1940. Despite Germany’s historical penchant for mounting counteroffensives when things looked darkest, the Allies’ leadership miscalculated and left the Ardennes lightly defended by only two inexperienced and two battered American divisions.

On December 16, three German armies (more than a quarter-million troops) launched the deadliest and most desperate battle of the war in the west in the poorly roaded, rugged, heavily forested Ardennes. The once-quiet region became bedlam as American units were caught flat-footed and fought desperate battles to stem the German advance at St.-Vith, Elsenborn Ridge, Houffalize and, later, Bastogne, which was defended by the 101st Airborne Division. The inexperienced U.S. 106th Division was nearly annihilated, but even in defeat helped buy time for Brigadier General Bruce C. Clarke’s brilliant defense of St.-Vith. As the German armies drove deeper into the Ardennes in an attempt to secure vital bridgeheads west of the River Meuse quickly, the line defining the Allied front took on the appearance of a large protrusion or bulge, the name by which the battle would forever be known.

A crucial German shortage of fuel and the gallantry of American troops fighting in the frozen forests of the Ardennes proved fatal to Hitler’s ambition to snatch, if not victory, at least a draw with the Allies in the west. Lieutenant General George S. Patton’s remarkable feat of turning the Third Army ninety degrees from Lorraine to relieve the besieged town of Bastogne was the key to thwarting the German counteroffensive. The Battle of the Bulge was the costliest action ever fought by the U.S. Army, which suffered over 100,000 casualties.