Battles of the American Civil War were fought between April 12, 1861 and May 12–13, 1865 in 19 states, mostly Confederate (Alabama, Arkansas, Florida, Georgia, Kansas, Kentucky, Louisiana, Maryland, Mississippi, Missouri, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, Vermont, Virginia, and West Virginia), the District of Columbia, and six territories (Arizona Territory (also Confederate Arizona), Colorado Territory, Dakota Territory, Indian Territory (present-day Oklahoma), New Mexico Territory, and Washington Territory), as well as naval engagements. Virginia in particular was the site of many major and decisive battles. These battles would change the standing and historical memory of the United States.