In 1944, Second World War Allied forces in the European Theater of Operations enjoyed considerable success, until a sudden German counteroffensive in December 1944, which became known as the Battle of the Bulge. More than a single battle, it was a two-week campaign with multiple engagements, the best-known being the U.S. defensive action at Bastogne, but also its flanks, a victory at St. Vith, and a number of lesser-known engagements. The counteroffensive was a surprise, and there were many questions as to why Allied intelligence had not given warning.[1]