After completing training the division left Abilene and departed from Camp Shanks, New York, for the European Theater of Operations on 20 September 1944. It landed at Liverpool, England on 2 October 1944. While awaiting replacement armor which had been borrowed by the U.S. Third Army, the 12th was sent to Tidworth Barracks in Wiltshire, UK. It crossed the English Channel from Southampton, arrived at Le Havre, France, on 11 November 1944 and then traveled up the Seine River to Rouen to join the Seventh Army under Lieutenant General Alexander Patch. Advance elements met the enemy near Weisslingen in Alsace on 5 December, and the entire division moved against the Maginot Line fortifications two days later.