Battle of Appomattox Court House in the context of "Army of the Potomac"

The conclusion of the American Civil War commenced with the articles of surrender agreement of the Army of Northern Virginia on April 9, at Appomattox Court House, by General Robert E. Lee and concluded with the surrender of CSS Shenandoah on November 6, 1865, bringing the hostilities of the American Civil War to a close. Legally, the war did not end until a proclamation by President Andrew Johnson on August 20, 1866, when he declared "that the said insurrection is at an end and that peace, order, tranquillity, and civil authority now exist in and throughout the whole of the United States of America." The Confederate government being in the final stages of collapse, the war ended by debellatio, with no definitive capitulation from the rapidly disintegrating Confederacy; rather, Lee's surrender marked the effective end of Confederate military operations. The Confederate cabinet held its final meeting on May 5, at which point it declared the Confederacy dissolved, ending its substantive existence; despite this, some remnant Confederate units did not surrender for another month.

Lee's defeat on April 9 began the effective end of the war, after which there was no substantial resistance, but the news of his surrender took time to spread and some fighting continued, though only small skirmishes. President Abraham Lincoln lived to see Lee's surrender after four bloody years of war, but he was assassinated just five days later. The Battle of Columbus, Georgia, was fought on April 16, the day after Lincoln died. For the most part though, news of Lee's defeat led to a wave of Confederate surrenders. Gen. Joseph E. Johnston surrendered his large Army of Tennessee and the Southeastern Department on April 26. The Confederate cabinet was dissolved on May 5, and Confederate president Jefferson Davis was captured by Union soldiers on May 10, one day after Lincoln's successor, Andrew Johnson, declared that the belligerent rights of the Confederacy were at an end, with the rebellion effectively over.

Ulysses S. Grant (born Hiram Ulysses Grant; April 27, 1822 – July 23, 1885) was the 18th president of the United States, serving from 1869 to 1877. In 1865, as commanding general, Grant led the Union Army to victory in the American Civil War.

Grant was born in Ohio and graduated from the United States Military Academy (West Point) in 1843. He served with distinction in the Mexican–American War, but resigned from the army in 1854 and returned to civilian life impoverished. In 1861, shortly after the Civil War began, Grant joined the Union Army, and he rose to prominence after securing victories in the western theater in 1862. In 1863, he led the Vicksburg campaign that gave Union forces control of the Mississippi River and dealt a major strategic blow to the Confederacy. President Abraham Lincoln promoted Grant to lieutenant general and command of all Union armies after his victory at Chattanooga. For thirteen months, Grant fought Robert E. Lee during the high-casualty Overland Campaign, which ended when Lee surrendered to Grant at Appomattox. In 1866, President Andrew Johnson promoted Grant to General of the Army. Later, Grant broke with Johnson over Reconstruction policies. A war hero, drawn in by his sense of duty, Grant was unanimously nominated by the Republican Party and then elected president in 1868.

The Appomattox Court House National Historical Park is the preserved 19th-century village named Appomattox Court House in Appomattox County, Virginia. The village was named for the presence nearby of what is now preserved as the Old Appomattox Court House. The village is the site of the Battle of Appomattox Court House, and contains the McLean House, where the surrender of the Army of Northern Virginia under Robert E. Lee to Union commander Ulysses S. Grant took place on April 9, 1865, an event widely symbolic of the end of the American Civil War. The village itself began as the community of Clover Hill, which was made the county seat of Appomattox County in the 1840s. The village of Appomattox Court House entered a stage of decline after it was bypassed by a railroad in 1854. In 1930, the United States War Department was authorized to erect a monument at the site, and in 1933 the War Department's holdings there was transferred to the National Park Service. The site was greatly enlarged in 1935, and a restoration of the McLean House was planned but was delayed by World War II. In 1949, the restored McLean House was reopened to the public. Several restored buildings (including the McLean House and the courthouse), as well as a number of original 19th-century structures are situated at the site.

Philip Henry Sheridan (March 6, 1831 – August 5, 1888) was a career United States Army officer and a Union general in the American Civil War. His career was noted for his rapid rise to major general and his close association with General-in-chief Ulysses S. Grant, who transferred Sheridan from command of an infantry division in the Western Theater to lead the Cavalry Corps of the Army of the Potomac in the East. In 1864, he defeated Confederate forces under General Jubal Early in the Shenandoah Valley and his destruction of the economic infrastructure of the Valley, called "The Burning" by residents, was one of the first uses of scorched-earth tactics in the war. In 1865, his cavalry pursued Gen. Robert E. Lee and was instrumental in forcing his surrender at Appomattox Courthouse.

In his later years, Sheridan fought in the Indian Wars against Native American tribes of the Great Plains. He was instrumental in the development and protection of Yellowstone National Park, both as a soldier and a private citizen. In 1883, Sheridan was appointed general-in-chief of the U.S. Army, and in 1888 he was promoted to the rank of General of the Army during the term of President Grover Cleveland.

The Gettysburg campaign was a military invasion of Pennsylvania by the main Confederate army under General Robert E. Lee in summer 1863. It was the first time during the war the Confederate Army attempted a full-scale invasion of a free state. The Union won a decisive victory at Gettysburg, July 1–3, with heavy casualties on both sides. Lee managed to escape back to Virginia with most of his army. It was a turning point in the American Civil War, with Lee increasingly pushed back toward Richmond until his surrender in April 1865. The Union Army of the Potomac was commanded by Maj. Gen. Joseph Hooker and then (from June 28) by Maj. Gen. George Meade.

After his victory in the Battle of Chancellorsville, Lee's Army of Northern Virginia moved north for a massive raid designed to obtain desperately needed supplies, to undermine civilian morale in the North, and to encourage anti-war elements. Lee's army slipped away from Federal contact at Fredericksburg, Virginia, on June 3, 1863. The largest predominantly cavalry battle of the war was fought at Brandy Station on June 9. The Confederates crossed the Blue Ridge Mountains and moved north through the Shenandoah Valley, capturing the Union garrison at Winchester, in the Second Battle of Winchester, June 13–15. Crossing the Potomac River, Lee's Second Corps advanced through Maryland and Pennsylvania, reaching the Susquehanna River and threatening the state capital of Harrisburg. However, the Army of the Potomac was in pursuit and had reached Frederick, Maryland, before Lee realized his opponent had crossed the Potomac. Lee moved swiftly to concentrate his army around the crossroads town of Gettysburg.