First Battle of Fort Fisher - Background

Background

After the failed Bermuda Hundred Campaign, Major General Benjamin Butler and his Army of the James were assigned to an amphibious expedition against Fort Fisher. Lieutenant General Ulysses S. Grant had originally designated one of Butler's subordinates, Major General Godfrey Weitzel, to lead the expedition, but Butler, as the commander of the Department of Virginia and North Carolina, demanded that he lead the troops himself and Grant acquiesced Units for the expedition were selected from the Army of the James and included the 2nd Division of the XXIV Corps and the 3rd Division from the XXV Corps, along with two battalions of heavy artillery and engineers. Colonel Cyrus B. Comstock from Grant's staff went along to serve as chief engineer. The Union naval expedition under Rear Admiral David D. Porter comprised the largest Union fleet of the war, nearly 60 warships along with the transports to carry the army troops.

Butler also planned to bring the USS Louisiana, which had been packed with 200 tons of powder and disguised as a blockade runner, down to Fort Fisher, run it aground about a hundred yards from the fort's seawall, and blow it up, hoping the explosion would demolish the fort as well. Although many in the Union high command (including Grant and Gideon Wells) doubted the plan would work, but it was approved by Lincoln. The final Union plan was for the ships to gather at Hampton Roads, where the army troops would board the transports. Because the monitors used in the attack had to be towed to Fort Fisher, the navy would leave with a twelve hours head start over the transports. The warships would refuel at Beaufort, then meet the transports at Fort Fisher, when the Louisiana would be detonated and the troops landed under the fire of the warships.

Fort Fisher, on Confederate Point, nicknamed the "Gibraltar of the Confederacy", was a formidable target commanding the Cape Fear River. It encompassed 14,500 ft.² and was surrounded by a 10-foot parapet and a network of bombproofs, most of which were 30 feet high. Many obstructions were laid around it, including land mines (called torpedoes in this era), abatis, and deep ditches. There were more than 50 heavy cannon, including 15 Columbiads and a 150-pounder Armstrong gun, behind a 60-foot mound of earth near the sea, named the Mound Battery. The fort's garrison of 1,400 men was commanded by Colonel William Lamb. Additional reinforcements were available from General Braxton Bragg at Sugar Loaf, 4 miles away. This force consisted of Major General Robert F. Hoke's division from the Army of Northern Virginia, which arrived on December 13.