 Complete the following phrase:  Beauregard was unhappy with his new assignment, believing that he deserved command of one of the great Confederate field armies. He performed successfully, however, preventing the capture of Charleston by Union naval and land attacks in 1863. On April 7, 1863, Rear Admiral Samuel Francis Du Pont, commander of the South Atlantic Blockading Squadron, led a union ironclad attack against Fort Sumter that was repulsed by highly accurate artillery fire from Beauregards forces. In July through September 1863, union land forces under Brig. Gen. Quincy A. Gillmore launched a series of attacks on 