The Chambersburg Raid, 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 (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 Peninsula Campaign.