After the successful amphibious invasion on D-Day in June 1944, the Allies began racing east toward Germany and liberating France along the way. The Allies had landed along a 50 mile stretch of French coast, and despite suffering 8,000 casualties on D-Day, over 100,000 still began the march across the western portion of the continent. By the end of August 1944, the German Army in France was shattered, with 200,000 killed or wounded and a further 200,000 captured. However, Adolf Hitler reacted to the news of invasion with glee, figuring it would give the Germans a chance to destroy the Allied armies that had water to their backs. As he put it, "The news couldn't be better. We have them where we can destroy them."

While that sounds delusional in retrospect, it was Hitler's belief that by splitting the Allied march across Europe in their drive toward Germany, he could cause the collapse of the enemy armies and cut off their supply lines. Part of Hitler's confidence came as a result of underestimating American resolve, but with the Soviets racing toward Berlin from the east, this final offensive would truly be the last gasp of the German war machine, and the month long campaign was fought over a large area of the Ardennes Forest, through France, Belgium and parts of Luxembourg.

From an Allied point of view, the operations were commonly referred to as the Ardennes Offensive, while the German code phrase for the operation was Unternehmen Wacht am Rhein ("Operation Watch on the Rhine"), with the initial breakout going under the name of "Operation Mist". Today, Americans know it best as the Battle of the Bulge.