1863 was the pivotal year of the American Civil War. The Union army, sensing victory, tried to deal a knockout blow to the Confederacy by taking control of the Mississippi River. After New Orleans fell to the Union, the city of Vicksburg remained as the last Confederate holdout on the big river. On May 18, 1963, 3200 Union troops arrived off the coast of Vicksburg and demanded an immediate surrender. But Confederate leaders refused, and the Union laid siege to the city. A month of heavy bombardment ensued. On June 17, city residents spotted the first zombie, and within days, dozens were wandering about. This development hardly worried the 30,000 Confederate troops protecting the city; they entertained themselves by conducting target practice on the zombies. But with their supply lines cut