On the approach of Jackson's corps General White evacuated Martinsburg, and with his garrison of two thousand men joined Miles at Harper's Ferry. That town, in the fork of the Potomac and Shenandoah rivers, can be bombarded with the greatest ease from the heights on the opposite sides of those streams. Miles, instead of taking possession of the heights with all his men, sent a feeble detachment to those on the north side of the Potomac, and stupidly remained in the trap with the rest. McLaws sent a heavy force to climb the mountain at a point three or four miles north, whence it marched along the crest through the woods, and attacked three or four regiments that Miles had posted there. This force was soon driven away, while Jackson was approaching the town from the other side, and a bombardment the next day compelled a surrender when Jackson was about to attack. General Miles was mortally wounded by one of the last shots. About eleven thousand men were included in the capitulation, with seventy-three guns and a considerable amount of camp equipage. A body of two thousand cavalry, commanded by Colonel Davis, had been with Miles, but had escaped the night before, crossed the Potomac, and by morning reached Greencastle, Pa. On the way they captured Longstreet's ammunition train of fifty wagons. Jackson, leaving the arrangements for the surrender to A. P. Hill, hurried with the greater part of his force to rejoin Lee, and reached Sharpsburg on the morning of the 16th.
| THE TWENTY-SECOND NEW YORK NEAR HARPER'S FERRY. |
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BREVET BRIGADIER-GENERAL J. C. KELTON. (Adjutant-General to General Halleck.) |
The range known as the South Mountain, which is a continuation of the Blue Ridge north of the Potomac, is about a thousand feet high. The two principal gaps are Turner's and Crampton's, each about four hundred feet high, with the hills towering six hundred feet above it.
When McClellan learned the plans of the Confederate commander, he set his army in motion to thwart them. He ordered Franklin's corps to pass through Crampton's Gap and press on to relieve Harper's Ferry; the corps of Reno and Hooker, under command of Burnside, he moved to Turner's Gap. The movement was quick for McClellan, but not quite quick enough for the emergency. He might have passed through the Gaps on the 13th with little or no opposition, and would then have had his whole army between Lee's divided forces, and could hardly have failed to defeat them disastrously and perhaps conclusively. But he did not arrive at the passes till the morning of the 14th; and by that time Lee had learned of his movement and recalled Hill and Longstreet, from Boonsborough and beyond, to defend Turner's Gap, while he ordered McLaws to look out for Crampton's.
Turner's Gap was flanked by two old roads that crossed the mountain a mile north and south of it; and using these, and scrambling up from rock to rock, the National troops worked their way slowly to the crests, opposed at every step by the Confederate riflemen behind the trees and ledges. Reno assaulted the southern crest, and Hooker the northern, while Gibbon's brigade gradually pushed along up the turnpike into the Gap itself. Reno was opposed by the Confederate brigade of Garland, and both these commanders were killed. There was stubborn and bloody fighting all day, with the Union forces slowly but constantly gaining ground, and at dark the field was won. The Confederates withdrew during the night, and in the morning the victorious columns passed through to the western side of the mountain. This battle cost McClellan fifteen hundred men, killed or wounded. Among the wounded was the lieutenant-colonel in command of the Twenty-third Ohio regiment—Rutherford B. Hayes, afterward President—who was struck in the arm by a rifle-ball. The Confederate loss in killed and wounded was about fifteen hundred, and in addition fifteen hundred were made prisoners. The fight at Crampton's Gap—to defend which McLaws had sent back a part of his force from Harper's Ferry—was quite similar to that at Turner's, and had a similar result. Franklin reached the crests after a fight of three hours, losing five hundred and thirty-two men, inflicting an equal loss upon the enemy, and capturing four hundred prisoners, one gun, and three battle-flags. These two actions (fought September 14, 1862) are generally designated as the battle of South Mountain, but are sometimes called the battle of Boonsborough. In that the enemy was driven away, the ground held, and the passes used, it was a victory, and a brilliant one, for McClellan. But in that Lee, by delaying the advance of his enemy a whole day, thereby gained time to bring together his own scattered forces, it was strategically a victory, though a costly one, for him. But then again it might be argued that if Lee could have kept the four thousand good troops that McClellan deprived him of at South Mountain, it might have fared better with him in the struggle at Antietam three days later.
When Lee retired his left wing from Turner's Gap, he withdrew across the Antietam, and took up a position on high ground between that stream and the village of Sharpsburg. His right, under McLaws, after detaining Franklin till Harper's Ferry was surrendered, crossed the Potomac at that place, recrossed it at Shepherdstown, and came promptly into position. Lee now had his army together and strongly posted. But it had been so reduced by losses in battle and straggling, that it numbered but little over forty thousand combatants. The effect upon the army itself of invading a rich country with troops so poorly supplied had probably not been anticipated. Lee complained bitterly that his army was "ruined by straggling," and General Hill wrote in his report: "Had all our stragglers been up, McClellan's army would have been completely crushed or annihilated. Thousands of thievish poltroons had kept away from sheer cowardice." General Hill, in his anger, probably overestimates the effect; for McClellan had somewhat over seventy thousand men, and though he used but little more than half of them in his attacks, there is no reason to suppose he would not have used them all in a defence. The men that Lee did have, however, were those exclusively that had been able to stand the hard marching and resist the temptation to straggle, and were consequently the flower of his army; and they now awaited, in a chosen position, a battle that they knew would be decisive of the campaign, if not of the war.
The ground occupied by the Confederate army, with one flank resting of the Potomac, and the other on the Antietam, which flowed in front, was advantageous. The creek was crossed by four stone bridges and a ford, and all except the northernmost bridge were strongly guarded. The land was occupied by meadows, cornfields, and patches of forest, and was much broken by outcropping ledges. McClellan only reconnoitred the position on the 15th. On the 16th he developed his plan of attack, which was simply to throw his right wing across the Antietam by the upper and unguarded bridge, assail the Confederate left, and when this had sufficiently engaged the enemy's attention and drawn his strength to that flank, to force the bridges and cross with his left and centre. Indeed, this was obviously almost the only practicable plan. All day long an artillery duel was kept up, in which, as General Hill says, the Confederate batteries proved no match for their opponents. It was late in the afternoon when Hooker's corps crossed by the upper bridge, advanced through the woods, and struck the left flank, which was held by two brigades of Hood's men. Scarcely more than a skirmish ensued, when darkness came on, and the lines rested for the night where they were. If Lee could have been in any doubt before, he was now told plainly what was to be the form of the contest, and he had all night to make his dispositions for it. The only change he thought it necessary to make was to put Jackson's fresh troops in the position on his left. Before morning McClellan sent Mansfield's corps across the Antietam to join Hooker, and had Sumner's in readiness to follow at an early hour. Meanwhile, all but two thousand of Lee's forces had come up. So the 17th of September dawned in that peaceful little corner of the world with everything in readiness for a great struggle in which there could be no surprises, and which was to be scarcely anything more than wounds for wounds and death for death.
In the vicinity of the little Dunker church, the road running northward from Sharpsburg to Hagerstown was bordered on both sides by woods, and in these woods the battle began when Hooker assaulted Jackson at sunrise. There was hard fighting for an hour, during which Jackson's lines were not only heavily pressed by Hooker in front, but at length enfiladed by a fire from the batteries on the eastern side of the Antietam. This broke them and drove them back; but when Hooker attempted to advance his lines far enough to hold the road and seize the woods west of it, he in turn was met by fresh masses of troops and a heavy artillery fire, and was checked. Mansfield's corps was moving up to his support when its commander was mortally wounded. Nevertheless it moved on, got a position in the woods west of the road, and held it, though at heavy cost. At this moment General Hooker was seriously wounded and borne from the field, while Sumner crossed the stream and came up with his corps. His men drove back the defeated divisions of the enemy without much difficulty, and occupied the ground around the church. His whole line was advancing to apparent victory, when two fresh divisions were brought over from the Confederate right, and were immediately thrust into a wide gap in Sumner's line. Sedgwick, whose division formed the right of the line, was thus flanked on his left, and was easily driven back out of the woods, across the clearing, and into the eastern woods, after which the Confederates retired to their own position. Fighting of this sort went on all the forenoon, one of the episodes being a race between the Fifth New Hampshire Regiment and a Confederate force for a commanding point of ground, the two marching in parallel lines and firing at each other as they went along. The New Hampshire men got there first, and, assisted by the Eighty-first Pennsylvania Regiment, from that eminence threw a destructive fire into the ranks of the regiment they had out-run. The fighting around the Dunker church was so fierce, and so much artillery fire was concentrated upon that spot, that when the woods were cut down, years afterward, and the logs sent to a saw-mill, the saws were completely torn to pieces by the metal that had penetrated the wood and been overgrown.