ed in on Vicksburg. (Williams 1)The first threat developed in May 1862, when the ships from the West Gulf Blockading Squadron arrived bellow Vicksburg and demanded that the surrender. The Surrender was refused. (Catton 231) It was then realized by both Union and Confederate high commands that would be in he hands of a huge combined land and naval effort. (Street 80)A decision was made to construct a line of defense around the city, which would guard the road and railroad access to Vicksburg. Therefore appointing Ulysses S. Grant in October of 1862. He was chosen to be the commander of the Department of the Tennessee and in charge of cleaning the Mississippi of Confederate resistance. Grants long campaign to capture Vicksburg on the Mississippi was one of the most important senses of connected battles during the Civil War. (Wheeler36)...