Vicksburg National Military Park preserves the site of the American Civil War Battle of Vicksburg, waged from May 18 to July 4, 1863. The park, in Vicksburg, Mississippi, and Delta, Louisiana, also commemorates the greater Vicksburg Campaign, which preceded the battle. Reconstructed forts and trenches evoke memories of the 47-day siege that ended in the surrender of the city. Victory here and at Port Hudson gave the United States control of the Mississippi River.