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. [Illustration: “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. [Illustration: “If I cannot whip Bobbie Lee, I will be willing to go home.” George B. McClellan] More men were killed or wounded at Antietam on September 17, 1862, than on any other single day of the Civil War. Federal losses were 12,410, Confederate losses 10,700. Although neither side gained a decisive victory, Lee’s failure to carry the war effort effectively into the North caused Great Britain to postpone recognition of the Confederate government. The battle also gave President Abraham Lincoln the opportunity to issue the Emancipation Proclamation, which, on January 1, 1863, declared free all slaves in States still in rebellion against the United States. Now the war had a dual purpose: to preserve the Union and end slavery.