American Civil War: Confederate troops conduct a raid on Chambersburg, Pennsylvania.

The American Civil War was a civil war in the United States between the Union and the Confederacy, which was formed in 1861 by states that had seceded from the Union. The central conflict leading to war was a dispute over whether slavery should be permitted to expand into the western territories, leading to more slave states, or be prohibited from doing so, which many believed would place slavery on a course of ultimate extinction.

The Raid on Chambersburg, often identified as J.E.B. Stuart's Chambersburg Raid, was a Confederate States Army cavalry raid into Maryland and Pennsylvania on October 10–12, 1862 during the American Civil War. It became known as Stuart's "second ride around McClellan" because it duplicated Stuart's reconnaissance ride completely around the Union Army of the Potomac under Major General George B. McClellan during the ill-fated Peninsula Campaign.