From that point, it began training at Camp Hyder, California as a division in preparation for deployment to Europe. The division trained in the northwestern United States during the next two years, earning its name "Timberwolf Division" from its time in the area. The division was the first U.S. Army division to be trained to fight in nighttime conditions. After training at Camp Adair, the division participation in the Oregon Maneuver combat exercise in the fall of 1943. On 15 October 1943, Major General Terry de la Mesa Allen, Sr. took command of the division. He had previously commanded the 1st Infantry Division, "The Big Red One", in North Africa and Sicily and would command the 104th during most of its time in combat.