The Port Gibson Battlefield is the site near Port Gibson, Mississippi where the 1863 Battle of Port Gibson was fought during the American Civil War. The battlefield covers about 3,400 acres (1,400 ha) of land west of the city, astride Rodney Road, where Union Army forces were establishing a beachhead after crossing the Mississippi River in a bid to take the Confederate fortress of Vicksburg. The Union victory secured that beachhead and paved the way for the eventual fall of Vicksburg. A 2,080-acre (840 ha) area surrounding part of the site was listed on the National Register of Historic Places in 1972, and a larger area was designated a National Historic Landmark in 2005. In 2009, the battlefield was designated by the Civil War Preservation Trust as one of its Top 10 most endangered Civil