The park includes 1,325 historic monuments and markers, of historic trenches and earthworks, a tour road, a walking trail, two antebellum homes, 144 emplaced cannons, the restored gunboat USS Cairo, and the Grant's Canal site, where the Union Army attempted to build a canal to let their ships bypass Confederateartillery fire. The Cairo, also known as the "Hardluck Ironclad," was the first U.S. ship in history to be sunk by a torpedo/mine. It was recovered from the Yazoo in 1964. The Illinois State Memorial has 47 steps, one for every day Vicksburg was besieged.
The Vicksburg National Cemetery, is within the park. It has 18,244 interments. The time period for Civil War interments was 1866 to 1874. The cemetery is not open to new interments. The cemetery has only one airman of Royal Australian Air Force buried during World War II.
Grant's Canal
The remnants of Grant's Canal, a detached section of the military park, are located across from Vicksburg near Delta, Louisiana. Union Army Major General Ulysses S. Grant ordered the project, started on June 27, 1862, as part of his Vicksburg Campaign, with two goals in mind. The first was to alter the course of the Mississippi River in order to bypass the Confederate guns at Vicksburg. For various technical reasons the project failed to meet this goal. The river did change course by itself on April 26, 1876. The project met its second goal, keeping troops occupied during the laborious maneuvering required to begin the Battle of Vicksburg.
Administrative history
The national military park was established on February 21, 1899, to commemorate the siege and defense of Vicksburg. The park sprawls over of land. The park and cemetery were transferred from the War Department to the National Park Service on August 10, 1933. Of the park's 1,736.47 acres, are federally owned. In the late 1950s, a portion of the park was transferred to the city as a local park in exchange for closing local roads running through the remainder of the park. It also allowed for the construction of Interstate 20. The monuments in land transferred to the city are still maintained by the NPS. As with all historic areas administered by the NPS, the park was listed on the National Register of Historic Places on October 15, 1966. Over half a million visitors visit the park every year.