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, located in Vicksburg, Mississippi, and Delta, Louisiana (flanking the Mississippi River), also commemorates the greater Vicksburg Campaign which led up to 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, farther south in Louisiana, gave the Union control of the Mississippi River.