Fort Hood is a United States Army post located in Killeen, Texas. Named after Confederate General John Bell Hood, it is located halfway between Austin and Waco, about 60 miles (97 km) from each, within the U.S. state of Texas. The post is the headquarters of III Corps and First Army Division West and is home to the 1st Cavalry Division and 3rd Cavalry Regiment, among others. It is one of ten U.S. Army bases named after former Confederate generals. Its origin was the need for wide-open space to test and train with World War II tank destroyers. The War Department announced the location in January 1942, and the initial completion was set for that August. As originally constructed, Fort Hood had an area of 158,706 acres (64,226 ha), with billeting for 6,007 officers and 82,610 enlisted personnel. The main cantonment of Fort Hood had a total population of 53,416 as of the 2010 U.S. Census. Fort Hood is the most populous U.S. military installation in the world. The main business area is in Bell County, with the training countryside area of the post in Coryell County. In April 2014, the Fort Hood website lists 45,414 assigned soldiers and 8,900 civilian employees with Fort Hood covering 214,000 acres (87,000 ha).