Civil War sites are locations in the United States that hold historical significance from the American Civil War, which lasted from 1861 to 1865. These sites include battlefields, forts, and military hospitals where key events took place. Many of these locations are preserved as national parks or monuments, allowing visitors to learn about the conflict and its impact on the nation. Some notable Civil War sites include Gettysburg National Military Park, where the pivotal Battle of Gettysburg occurred, and Antietam National Battlefield, known for the bloodiest single-day battle in American history. These sites often feature museums, guided tours, and educational programs to help people understand the complexities of the war.