The Defense Logistics Agency, also known as DLA, is a combat support agency that serves military services and civilian agencies in the United States. It provides a range of logistical support for peacetime and wartime operations, as well as emergency preparedness and humanitarian missions. Founded in 1961, the Defense Logistics Agency operates a network of more than 21,000 civilian and military employees in the U.S., as well as over 25 foreign countries. It has various business units, including the Defense Energy Support Center, Defense Supply Center Columbus, Defense Distribution Center and Defense Reutilization and Marketing Service. The agency also operates the Defense National Stockpile Center, Defense Logistics Information Service and DLA Europe.