Bombardment
At 4:30 a.m. on April 12, Lt. Henry S. Farley, acting upon the command of Capt. George S. James, fired a single 10-inch mortar round from Fort Johnson. (James had offered the first shot to Roger Pryor, a noted Virginia secessionist, who declined, saying, "I could not fire the first gun of the war.") The shell exploded over Fort Sumter as a signal to open the general bombardment from 43 guns and mortars at Fort Moultrie, Fort Johnson, the floating battery, and Cummings Point. Under orders from Beauregard, the guns fired in a counterclockwise sequence around the harbor, with 2 minutes between each shot; Beauregard wanted to conserve ammunition, which he calculated would last for only 48 hours. Edmund Ruffin, another noted Virginia secessionist, had traveled to Charleston to be present for the beginning of the war, and fired one of the first shots at Sumter after the signal round, a 64-pound shell from the Iron Battery at Cummings Point. The shelling of Fort Sumter from the batteries ringing the harbor awakened Charleston's residents (including diarist Mary Chesnut), who rushed out into the predawn darkness to watch the shells arc over the water and burst inside the fort.
Major Anderson held his fire, awaiting daylight. His troops reported for a call at 6 a.m. and then had breakfast. At 7 a.m., Capt. Abner Doubleday fired a shot at the Ironclad Battery at Cummings Point. He missed. Given the available manpower, Anderson could not take advantage of all of his 60 guns. He deliberately avoided using guns that were situated in the fort where casualties were most likely. The fort's best cannons were mounted on the uppermost of its three tiers—the barbette tier—where his troops were most exposed to incoming fire from overhead. The fort had been designed to withstand a naval assault, and naval warships of the time did not mount guns capable of elevating to shoot over the walls of the fort; however, the land-based cannons manned by the Confederates were capable of landing such indirect fire on Fort Sumter. Fort Sumter's garrison could only safely fire the 21 working guns on the lowest level, which themselves, because they were emplaced in stone, were largely incapable of indirect fire that could seriously threaten Fort Moultrie. Moreover, although the Federals had moved as many of their supplies to Fort Sumter as they could manage, the fort was quite low on ammunition, and was nearly out at the end of the 34-hour bombardment. A more immediate problem was the scarcity of cloth gunpowder cartridges or bags; only 700 were available at the beginning of the battle and workmen sewed frantically to create more, in some cases using socks from Anderson's personal wardrobe. Because of the shortages, Anderson reduced his firing to only six guns: two aimed at Cummings Point, two at Fort Moultrie, and two at the Sullivan's Island batteries.
Ships from Fox's relief expedition began to arrive on April 12. Although Fox himself arrived at 3 a.m. on his steamer Baltic, most of the rest of his fleet was delayed until 6 p.m., and one of the two warships, USS Powhatan, never did arrive. Unbeknownst to Fox, it had been ordered to the relief of Fort Pickens in Florida. As landing craft were sent toward the fort with supplies, the artillery fire deterred them and they pulled back. Fox decided to wait until after dark and for the arrival of his warships. The next day, heavy seas made it difficult to load the small boats with men and supplies and Fox was left with the hope that Anderson and his men could hold out until dark on April 13.
Although Sumter was a masonry fort, there were wooden buildings inside for barracks and officer quarters. The Confederates targeted these with "hot shot" rounds (cannonballs that had been heated in ovens), starting fires that could prove more dangerous to the men than the explosive artillery. At 7 p.m. on April 12, a rain shower extinguished the flames and at the same time the Union gunners stopped firing for the night. They slept fitfully, concerned about a potential infantry assault against the fort. During the darkness, the Confederates reduced their fire to four shots each hour. The following morning, the full bombardment resumed and the Confederates continued firing hot shot against the wooden buildings. By noon most of the wooden buildings in the fort and the main gate were on fire. The flames moved toward the main ammunition magazine, where 300 barrels of gunpowder were stored. The Union soldiers frantically tried to move the barrels to safety, but two-thirds were left when Anderson judged it was too dangerous and ordered the magazine doors closed. He ordered the remaining barrels thrown into the sea, but the tide kept floating them back together into groups, some of which were ignited by incoming artillery rounds. He also ordered his crews to redouble their efforts at firing, but the Confederates did the same, firing the hot shots almost exclusively. Many of the Confederate soldiers admired the courage and determination of the Yankees. When the fort had to pause its firing, the Confederates often cheered and applauded after the firing resumed and they shouted epithets at some of the nearby Union ships for failing to come to the fort's aid.
Read more about this topic: Battle Of Fort Sumter