Clara Barton, who tended the wounded at Antietam during and after the battle.
The battle opened at dawn on the 17th when Union Gen. Joseph Hooker’s artillery began a murderous fire on Jackson’s men in the Miller cornfield north of town. “In the time I am writing,” Hooker reported, “every stalk of corn in the northern and greater part of the field was cut as closely as could have been done with a knife, and the slain lay in rows precisely as they had stood in their ranks a few moments before.” Hooker’s troops advanced, driving the Confederates before them, and Jackson reported that his men were “exposed for near an hour to a terrific storm of shell, canister, and musketry.”
About 7 a.m. Jackson was reenforced and succeeded in driving the Federals back. An hour later Union troops under Gen. Joseph Mansfield counterattacked and by 9 o’clock had regained some of the lost ground. Then, in an effort to extricate some of Mansfield’s men from their isolated position near the Dunker Church, Gen. John Sedgwick’s division of Edwin V. Sumner’s corps advanced into the West Woods. There Confederate troops struck Sedgwick’s men on both flanks, inflicting appalling casualties.
“I have always had a high opinion of General McClellan, and have no reason to suppose that he failed to accomplish anything that he was able to do.”
Robert E. Lee
Meanwhile, Gen. William H. French’s division of Sumner’s corps moved up to support Sedgwick but veered south into Confederates under Gen. D. H. Hill posted along an old sunken road separating the Roulette and Piper farms. For nearly 4 hours, from 9:30 a.m. to 1 p.m., bitter fighting raged along this road (afterwards known as Bloody Lane) as French, supported by Gen. Israel B. Richardson’s division, also of Sumner’s corps, sought to drive the southerners back. Confusion and sheer exhaustion finally ended the battle here and in the northern part of the field generally.
Southeast of town, Union Gen. Ambrose E. Burnside’s troops had been trying to cross a bridge over Antietam Creek since 9:30 a.m. Some 400 Georgians had driven them back each time. At 1 p.m. the Federals finally crossed the bridge (now known as Burnside Bridge) and, after a 2-hour delay to reform their lines, advanced up the slope beyond. By late afternoon they had driven the Georgians back almost to Sharpsburg, threatening to cut off the line of retreat for Lee’s decimated Confederates. Then about 4 p.m. Gen. A. P. Hill’s division, left behind by Jackson at Harpers Ferry to salvage the captured Federal property, arrived on the field and immediately entered the fight. Burnside’s troops were driven back to the heights near the bridge they had earlier taken. The Battle of Antietam was over. The next day Lee began withdrawing his army across the Potomac River.
“If I cannot whip Bobbie Lee, I will be willing to go home.”