American Civil War: Second Battle of Winchester: A Union garrison is defeated by the Army of Northern Virginia in the Shenandoah Valley town of Winchester, Virginia.

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 Second Battle of Winchester was fought between June 13 and June 15, 1863, in Frederick County and Winchester, Virginia as part of the Gettysburg Campaign during the American Civil War. As Confederate Lieutenant General Richard S. Ewell moved north through the Shenandoah Valley in the direction of Pennsylvania, his corps defeated the Union Army garrison commanded by Major General Robert H. Milroy, capturing Winchester and numerous Union prisoners.

The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 340 million.

The Army of Northern Virginia was a field army of the Confederate States Army in the Eastern Theater of the American Civil War. It was also the primary command structure of the Department of Northern Virginia. It was most often arrayed against the Union's Army of the Potomac.