The Battle of the Bulge was the largest and most costly battle fought by the US Army in World War II. This work covers this battle, and includes new findings such as access to a US Army database, and providing unit data on a day-to-day basis. It also includes interviews conducted by US Army officers of key German officers between 1945 and 1947. It analyzes the fighting in the northern sector, covering the area around St Vith and the Elsenborn Ridge.