On Saturday, July 4, and Sunday July 5, 2015 the Vicksburg National Military Park Living History Detachment will present artillery demonstrations commemorating the 152nd Anniversary of the Confederate Surrender of the Vicksburg Garrison, which occurred after a hard fought 47 day siege. Programs will be held at Park Tour Stop 1, Battery DeGolyer. They will be held at 9am, 10am, 11am, 1pm, 2pm, and 3pm each day. The programs will each last approximately fifteen minutes.