Fort Hood is a U.S. military post located in Killeen, Texas. The post is named after Confederate General John Bell Hood. It is located between Austin and Waco, about 60 miles (100 km) from each, within the U.S. state of Texas. Fort Hood is an installation of the United States Army and is the largest military base in the world (by area) with more than 215,000 acres. Fort Hood is the most populous U.S. military installation in the world. In April 2014, the Fort Hood website lists 45,414 assigned soldiers and 8,900 civilian employees with Fort Hood covering 214,000 acres.

In 1942 about 300 families had to move from their homes to make room for the camp area and the communities of Clear Creek, Elijah, and Antelope were demolished. The old Sugar Loaf community, historically called the "Cradle of Killeen," provided the city with many of its first citizens in 1882. All that remains of the community is the mountain from which it took its name, located in the Fort Hood area. To lessen the burden of moving, the Army agreed to allow land to be used for grazing for a nominal grazing fee. This grazing arrangement still continues today.

On 5 November 2009, a gunman opened fire in the Soldier Readiness Center of Fort Hood and killed 13 people while wounding 32 others. Nidal Malik Hasan, a U.S. Army Major and psychiatrist, was the gunman. He was non-fatally shot and then arrested by Department of the Army police officers. He was convicted and sentenced to death.

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