Fort Hood is the home of III Corps Headquarters, 1st Cavalry Division, 1st Army Division West, 13th Sustainment Command (Expeditionary), and other brigades, tenant units, and organizations. Located on 218,823 acres in south central Texas, the installation creates a huge annual economic impact of $35.4 billion. With a Soldier population of 36,046 and training an additional 22,000 Reserve Soldiers annually, Fort Hood environmentally impacts the region, as well--in very big, very positive ways.