Grant's Headquarters at City Point is a museum operated by the National Park Service at Appomattox Manor in Hopewell, Virginia. It is a unit of the Petersburg National Battlefield Park. City Point was a port on the James River. During the last years of the American Civil War, from the port there, the City Point Railroad was used to support the Union forces during the Siege of Petersburg 1864–65. The successful capture of Petersburg and its network of railroads was the key to the fall of the Confederate capital city of Richmond, ending the war less than a week later.