The victors of South Mountain slept upon the field of battle, on the night of September 14th. On the morning of the 15th, at early dawn, the Union pickets were pressed forward, and it was found that the dejected rebels had retired under cover of the night. An immediate pursuit was ordered. The army moved forward at once, in three columns. The first, containing the main force of cavalry, and led by Generals Pleasanton, Sumner, Hooker and Mansfield, advanced along the national turnpike road, by way of Boonsboro’. The second, led by Generals Burnside and Porter, moved by the old Sharpsburgh road. The third, led by General Franklin, went by Pleasant Valley, to occupy Robersville, and relieve Harper’s Ferry. The latter had not gone far, however, when the cessation of firing in the direction of the Ferry, gave notice that Colonel Miles had yielded his post. Still, in all directions, the advance pressed onward. It soon became evident that the rebels were taking up a strong position in front, and that a general battle was impending. General McClellan immediately went forward, examined the ground, to direct the formation of the Union line of battle. The rebels had fortified themselves on the west bank of Antietam creek, where they displayed their infantry, cavalry and artillery, in large force. The Union corps were massed on and near the Sharpsburgh road. During the 15th and 16th, both armies manœuvred for advantages of position; but the general battle—one of the most important that was fought during the war—did not commence until daybreak of the 17th. At this time, the relative positions of the combatants were as follows: Hooker, with his corps, consisting of General Rickett’s, Meade’s and Doubleday’s divisions, had crossed Antietam creek on the afternoon of the previous day; and, after some sharp skirmishing with the enemy, had gained the desired position, and bivouacked for the night. General Mansfield’s corps consisting of the divisions of William and Green, had crossed the creek during the night, and taken up position, a mile in rear of General Hooker. On the right of the turnpike, near the creek, was posted a division of General Sumner’s corps, under command of General Richardson; and, on the left, in line with Richardson, a division of General Porter’s corps, under command of General Sykes. The batteries of Captain Taft, Langrel, Von Kleiner, and of Lieutenant Weaver, each of twenty-pounder Parrott guns, were placed in front of the Sharpsburgh turnpike. Captain Weed’s three-inch, and Lieutenant Benjamin’s twenty-pounder batteries were on the crest of the hill, in the rear and right of bridge number three that crossed the creek; and the division of General Couch with General Franklin’s corps, in front of Brownsville, in Pleasant Valley,—with a large force of the enemy directly in front.
The position of the enemy was a very favorable one. It is thus described by General McClellan:
“The masses of his troops were still concealed behind the opposite heights. Their left and centre were upon and in front of the Sharpsburgh and Hagerstown turnpike, hidden by woods and irregularities of the ground; their extreme left resting upon a wooded eminence near the cross roads to the north of J. Miller’s farm: their left resting upon the Potomac. Their line extended south, the right resting upon the hills to the south of Sharpsburgh, near Shaveley’s farm.
“The bridge over the Antietam, described as No. 3, near this point, was strongly covered by riflemen protected by rifle-pits, stone fences, etc., and enfiladed by artillery. The ground in front of this line consisted of undulating hills, their crests in turn commanded by others in the rear. On all favorable points the enemy’s artillery was posted, and their reserves, hidden from view by the hills, on which their line of battle was formed, could manœuvre unobserved by our army, and from the shortness of their line could rapidly reinforce any point threatened by our attack. Their position, stretching across the angle formed by the Potomac and Antietam, their flanks and rear protected by these streams, was one of the strongest to be found in this region of country, which is well adapted to defensive warfare.”
At dawn of the 17th, skirmishing by the Pennsylvania reserves opened the battle for the day. General Hooker’s entire corps was soon engaged. The right of General Pickett’s line, and the left of General Meade’s reserve, opened fire at about the same moment. A battery was pushed forward into the middle of an open field, where some of the deadliest struggles of the bloody battle subsequently took place. For half an hour, the line did not swerve a hair’s-breadth from the right to the left. At the close of the half hour, the enemy began to fall slowly back. Their first receding movement inspired the brave patriots before them. Forward! was the cry; and the whole line moved forward, with a cheer and a rush; while the rebels in full retreat, running over corn-fields, crossing roads and leaping fences, fled before them.
Close upon the footsteps of the foe, passing over the dead and wounded—for these the rebels were compelled to leave in their wake—followed the soldiers of the Union, till at length the enemy disappeared within a wood. Still the Federals pressed on, and gallantly threw themselves upon the cover; when suddenly, from out the gloom and shadow of the trees, was hurled a fearful volley of fire, that caused their undaunted front to waver, bend and break, and sent them, panic-stricken, many yards back. But, almost instantly closing up their shattered lines, they quickly recovered from this temporary confusion; and, though they could not attempt another advance, their ammunition being expended, those who were left to oppose the advancing masses of the enemy retreated in good order, very slowly, their ranks so thinned that, where brigades had been, scarcely regiments remained—little more than a brigade, where had been a whole victorious division. A contemporary account of the battle speaks as follows of the unexpected reverse, there and then encountered by the gallant patriots.
“In ten minutes, the fortune of the day seemed to have changed; it was the rebels now who were advancing, pouring out of the woods in endless lines, sweeping through the corn-field from which their comrades had just fled. Hooker sent in his nearest brigade to meet them, but it could not do the work. He called for another. There was nothing close enough, unless he took it from his right. His right might be in danger if it was weakened, but his centre was already threatened with annihilation. Not hesitating one moment, he sent orders to Doubleday: ‘Give me your best brigade instantly.’
“The best brigade came down the hill to the right on a run, went through the timber in front swept by a storm of shot and bursting shell and crashing limbs, over the open field beyond and straight into the open corn-field, passing as they went the fragments of three brigades shattered by the rebel fire and streaming to the rear. They passed by Hooker, whose eyes lighted as he saw these veteran troops, led by a soldier whom he knew he could trust. ‘I think they will hold it,’ he said.
“General Hartsuff took his troops very steadily, but, now that they were under fire, not hurriedly, up the hill from which the corn-field begins to descend, and formed them on the crest. Not a man who was not in full view—not one who bent before the storm. Firing at first in volleys, they fired then at will with wonderful rapidity and effect. The whole line crowned the hill and stood out darkly against the sky, but lighted and shrouded ever in flame and smoke. They were the Twelfth and Thirteenth Massachusetts and another regiment—old troops all of them.
“There, for half an hour, they held the ridge, unyielding in purpose, exhaustless in courage. There were gaps in the line, but it nowhere bent. Their General was severely wounded, early in the fight, but they fought on. Their supports did not come—they determined to win without them. They began to go down the hill and into the corn; they did not stop to think that their ammunition was nearly gone; they were there to win that field, and they won it. The rebel line for the second time fled through the corn and into the woods. I cannot tell how few of Hartsuff’s brigade were left when the work was done; but it was done. There was no more gallant, determined, heroic fighting, in all this desperate day. General Hartsuff is very severely wounded, but I do not believe he counts his success too dearly purchased.
“The crisis of the fight at this point had arrived. Rickett’s division, vainly endeavoring to advance and exhausted by the effort, had fallen back. Part of Mansfield’s corps was ordered to their relief, but Mansfield’s troops came back again, and their General was mortally wounded. The left nevertheless was too extended to be turned, and too strong to be broken. Rickett sent word he could not advance, but could hold his ground. Doubleday had kept his guns at work on the right, and had finally silenced a rebel battery that for half an hour had poured in a galling enfilading fire along Hooker’s central line. There were woods in front of Doubleday’s hill which the rebels held, but so long as those guns pointed toward them they did not care to attack.
“With his left, then, able to take care of itself, with his right impregnable, with two brigades of Mansfield still fresh and coming rapidly up, and with his centre a second time victorious, General Hooker determined to advance. Orders were sent to Crawford and Gordon—the two Mansfield brigades—to move forward at once, the batteries in the centre were ordered to advance, the whole line was called on, and the General himself went forward.
“To the right of the corn-field and beyond it was a point of woods. Once carried and firmly held, it was the key of the position. Hooker determined to take it. He rode out in front of his furthest troops on a hill, to examine the ground for a battery. At the top he dismounted and went forward on foot, completed his reconnoissance, returned, and remounted. The musketry fire from the point of woods was all the while extremely hot. As he put his foot in the stirrup a fresh volley of rifle bullets came whizzing by. The tall, soldierly figure of the General, the white horse which he rode, the elevated place where he was, all made him a dangerously conspicuous mark. So he had been all day, riding often without a staff-officer or an orderly near him—all sent off on urgent duty—visible everywhere on the field. The rebel bullets had followed him all day, but they had not hit him, and he would not regard them.
“Remounting on this hill, he had not ridden five steps when he was struck in the foot by a ball. Three men were shot down at the same moment by his side. The air was alive with bullets. He kept on his horse a few minutes, though the wound was severe and excessively painful, and would not dismount till he had given his last order to advance. He was himself in the very front. Swaying unsteadily on his horse, he turned in his seat to look about him. “There is a regiment to the right. Order it forward! Crawford and Gordon are coming up. Tell them to carry those woods and hold them—and it is our fight!”
“It was found that the bullet had passed completely through his foot.”
General Hooker being disabled, General Meade was placed in command of Hooker’s Corps. Gordon and Crawford were sent to the woods, where they fought slowly against a rebel force far outnumbering their own; General Sedgwick’s division was rapidly moving to the aid of Crawford and Gordon, who required the coming assistance, for rebel reinforcements were constantly arriving. Observing that the struggle for the works was about to recommence, General Sumner sent the divisions of French and Richardson to the left of Crawford. General Sedgwick, with the eye of practiced generalship, quickly saw, as he moved his troops in column through the rear of the woods, that, with so broad a space as was between him and the nearest division, he stood in danger of being outflanked, if the rebel line were completed. Under a dreadful fire he was obliged to order the Thirty-fourth New York to move by the left flank, and the consequence was that the regiment broke. The enemy, not slow to perceive his advantage, came round on the weak point, and obliged Crawford to give way on the right. The routed troops poured through the ranks of Sedgwick’s advance brigade, causing great confusion, and forcing it back on the second and third lines; still the enemy’s fire grew hotter, while they steadily advanced upon the disordered Union forces. General Sedgwick, wounded in the shoulder, the leg, and the wrist, still bravely kept his seat, nor thought of leaving the field while any chance remained of saving it. But the position could not be held; and General Sumner, having in vain attempted to stop the confusion and disorder, himself withdrew the division to the rear, abandoning the field to the enemy.
While the conflict to the right was hotly raging, General French was pushing the rebels severely on the left. This division crossed Antietam creek, in three columns, and marched a mile, to the ford. Then, facing to the left, it moved direct upon the enemy. The division was assailed by a brisk artillery fire, but it steadily advanced, driving back the rebel skirmishers, to a group of houses on a piece of land called Roulette’s farm, where the Federals encountered the rebel infantry in large force, but soon drove them from their position. The brigade of General Kimball was next pushed forward, by General French, in obedience to orders received from his corps commander. This brigade drove the enemy before it, to the crest of the hill; but the rebels were there encountered in much stronger force, protected in a natural rifle-pit formed by a sunken road running in a northwesterly direction. Beyond this, in a corn-field, there was yet another body of rebels; and, as the Union line came forward, a severe fire was poured upon them from the corn-field and from the rifle-pit. When the Federals reached the crest of the hill, volleys of musketry burst from both lines, and the fight raged hotly, and with dreadful carnage. An effort of the enemy to turn the left of the line was met and signally repulsed by the Seventh Virginia, and One Hundred and Thirty-second Pennsylvania Volunteers: on being foiled in this effort, the rebels assaulted the Union front, but were again driven back with severe loss, the Unionists capturing three hundred men and several stands of colors. Another attack was made on the right of French’s division, but was met by the Fourteenth Indiana and Eighth Ohio Volunteers, and by a storm of canister from Captain Tompkins’ battery, First Rhode Island Artillery. The enemy now gave up all attempts to regain this ground; and the division, which had been under very hot fire for more than four hours, and had expended nearly all its ammunition, took position below the crest of the heights which they had so nobly won. During this time, Richardson’s division had been engaged on the left. General Richardson was badly wounded in the shoulder. General Meagher’s brigade fought so as to increase its well deserved reputation for courage, and strewed the ground with the foe, till its ammunition gave out, and its brave leader was disabled by a wound, and by having his horse shot under him. The Irish brigade was then ordered to give place to that of General Caldwell; and the second line was formed by General Brooks’ brigade.
The ground over which Generals Richardson’s and French’s divisions were fighting was very irregular, intersected by numerous ravines, hills covered with growing corn, inclosed by stone walls, behind which the enemy could advance unobserved upon any exposed point of our lines, Taking advantage of this, the enemy attempted to gain the right of Richardson’s position in a corn-field near Roulette’s house, where the division had become separated from that of General French’s. A change of front by the Fifty-second New York and Second Delaware volunteers, of Colonel Brooks’s brigade, under Colonel Frank, and the attack made by the Fifty-third Pennsylvania volunteers, sent further to the right by Colonel Brooks to close this gap in the line, and the movement of the One Hundred and Thirty-second Pennsylvania and Seventh Virginia volunteers of General French’s division before referred to, drove the enemy from the corn-field and restored the line.
The brigade of General Caldwell, with determined gallantry, pushed the enemy back opposite the left and centre of this division, but sheltered in the sunken road, they still held our forces on the right of Caldwell in check. Colonel Barlow, commanding the Sixty-first and Sixty-fourth New York regiments of Caldwell’s brigade, seeing a favorable opportunity, advanced the regiments on the left, taking the line in the sunken road in flank, and compelled them to surrender, capturing over three hundred prisoners and three stands of colors.
The whole of the brigade, with the Fifty-seventh and Sixty-sixth New York regiments of Colonel Brooks’s brigade, who had moved these regiments into the first line, now advanced with gallantry, driving the enemy before them in confusion into the corn-field beyond the sunken road. The left of the division was now well advanced, when the enemy, concealed by an intervening ridge, endeavored to turn its left and rear.
Colonel Cross, Fifth New Hampshire, by a change of front to the left and rear, brought his regiment facing the advancing line. Here a spirited contest arose to gain a commanding height, the two opposing forces moving parallel to each other, giving and receiving fire. The Fifth gaining the advantage, faced to the right and delivered its volley. The enemy staggered, but rallied and advanced desperately at a charge. Being reinforced by the Eighty-first Pennsylvania, these regiments met the advance by a counter charge. The enemy fled, leaving many killed, wounded, and prisoners, and the colors of the Fourth North Carolina, in the victors’ hands.
Another column of the enemy, advancing under shelter of a stone wall and corn-field, pressed down on the right of the division; but Colonel Barlow again advanced the Sixty-first and Sixty-fourth New York against these troops, and with the attack of Kimball’s brigade on the right, drove them from this position.
On the left of this part of the line, the Union troops having driven back a determined attack of the enemy, the rebels made a rush upon the front, but were fiercely repulsed by two regiments under Colonel Barlow, who followed them through the corn-field and into the orchard beyond. A building called Riper’s house was a strong point here; and Colonel Barlow’s advance gave the Union men possession of it, and they at once occupied it. A section of Robertson’s horse battery now arrived, and in good time, for Richardson’s division up to that juncture had been without artillery; and subsequently Captain Graham, First Artillery, commanding a battery of brass guns, arrived, and taking a position on the crest of the hill, soon silenced the enemy’s guns in the orchard. Heavy firing began immediately; and while directing the firing of Captain Graham’s battery, the gallant Richardson was mortally wounded. The place of General Richardson was supplied by General Hancock. Colonel Bunke, of the Sixty-third New York, commanding General Meagher’s brigade, was ordered to the centre.
The battle raged with uninterrupted fury; and on right and left, rebels and Unionists strewed the ground with gory corpses. The groans and cries of the wounded and dying filling up every interval of the battle’s roar. Dark and darker grew the aspect of affairs. The different battle-fields were shut out from each other’s view, but all were visible from a centre hill, from which General McClellan, during the whole day, with his field-glass held to his eyes, watched eagerly and anxiously the fighting of the several brave corps under his command.
The afternoon was waning; and things looked very black for the Army of the Union. At three o’clock General McClellan issued an order to General Burnside to push forward his troops with all possible vigor, and carry the enemy’s position on the heights. General Burnside replied that he would advance up the hill as far as he could, before being stopped by a battery, placed directly in his path. Upon hearing this, General McClellan ordered Burnside to flank the battery, storm it, and carry the heights.
The advance was made most gallantly, the enemy utterly routed, and the heights carried triumphantly. Night was now approaching, and the enemy was receiving strong reinforcements from Harper’s Ferry. General Burnside’s troops were attacked on the left flank, and obliged to retire to a lower line of hills, near the bridge and the question as to whether the well-won position on the heights could be maintained, became a problem of vital importance. Burnside’s brigades were in close columns, and would not give way before a bayonet charge; and the enemy hesitated to dash in on the dense masses of Union soldiers. Then suddenly the rebel left gave way, scattering over the field, but the rest stood firm, and poured forth a heavy fire upon the Federals. More infantry came up, and General Burnside found himself outnumbered, outflanked, and compelled to yield up the position he fought so bravely to win. He no longer attacked; but, with unfaltering firmness, defended himself, and sent to General McClellan for help.
McClellan already knew of the sore strait to which Burnside was reduced, for his glass had not been turned away from the hard-pressed left of the field; but to send assistance was out of his power. In the valley, Porter’s fifteen thousand troops were impatient to join the fight; but when the two Generals, McClellan and Porter, looked into each other’s faces, each read in the other’s eyes, “They are the only reserves of the army—they cannot be spared.” As an answer to General Burnside’s desire for reinforcements, the Commander-in-Chief was obliged to reply:
“Tell General Burnside this is the battle of the war. He must hold his ground till dark at any cost. I will send him Miller’s battery. I can do nothing more. I have no infantry.” Then as the messenger was riding away he called him back. “Tell him if he cannot hold his ground, then the bridge, to the last man!—always the bridge! If the bridge is lost, all is lost.”
Till Burnside’s message reached McClellan, no one anticipated that the battle could be concluded on that day; and few expected how near was the peril of total defeat. But suddenly and unexpectedly, the rebels halted, instead of pushing forward, and following up the advantage gained in recapturing the hill. As the twilight deepened into darkness, the fierce, wrathful cannonading ceased, and the long, desperately-contested battle of Antietam was over. For fourteen hours nearly two hundred thousand men, and five hundred pieces of artillery had been engaged in this memorable battle. The Army of the Potomac, notwithstanding the moral depression consequent upon its late severe reverses, had achieved a great victory over an army elated by recent successes; and, on the night of September 17th, the soldiers of the Union slept in peace and triumph on a field won by dauntless bravery, and covered with the dead and wounded, friends and foes, patriots and rebels.
On both sides the casualties among officers in the battle of Antietam was unusually numerous. Among the rebel killed were Brigadier-Generals Starke and Branche, and among their wounded were Major-General Anderson, Brigadier-Generals Anderson, Lawton, Wright, Ripley, Amistead and Ransome.
The Union army was called upon to mourn the loss, among many other valuable officers, of Brigadier-General Isaac P. Rodman, of Rhode Island. He had left the quiet pursuits of business, and volunteered in defence of the Government. He entered the service in one of the regiments of his native State as Captain, and was quickly promoted to a Colonelcy, and led his regiment in General Burnside’s North Carolina expedition. He was made a Brigadier for services at Roanoke and Newbern, and was mortally wounded while acting as division commander at Antietam. The loss of the Federal army in this terrible battle bears ample testimony to its courage and endurance. From the official records the total loss in killed was two thousand and ten; missing, one thousand and forty-three; total, twelve thousand and sixty-nine. The combined loss at South Mountain, Antietam and Harper’s Ferry, was twenty-six thousand three hundred and ninety-four.
The report of General McClellan estimates the rebel loss in Maryland at thirty thousand men.
General Burnside, whose corps was stationed on the left of the Federal lines, testified before the investigating committee of Congress, that at half-past eight o’clock in the evening of the 17th, he went over to McClellan’s headquarters, and urged the renewal of the attack, saying that with five thousand fresh troops to place beside his own, he was willing to commence the attack in the morning. As his corps had maintained the most critical position during the battle, and had defended the salient points with remarkable bravery and endurance, while suffering heavy loss, it may not be amiss to record his testimony in this place.
General Franklin, whose corps occupied a position on the right of the Federal lines, also gave testimony before the Commission in the following terms:
“When General McClellan visited the right in the afternoon, I showed him a position on the right of this wood, which I have already mentioned, in which was the Dunker church, which I thought commanded the wood; and that if it could be taken, we could drive the enemy from the wood, by merely holding this point. I advised that we should make the attack on that place the next morning from General Sumner’s position. I thought there was no doubt about our being able to carry it. We had plenty of artillery bearing upon it. We drove the enemy from there that afternoon, and I had no doubt we could take the place the next morning, and I thought that would uncover the whole left of the enemy.”
No advance was made by the Federal forces on the 18th, which passed away without any engagement. General McClellan was waiting for reinforcements under Generals Couch and Humphreys, then on their way, and in the mean time, had ordered an attack on the 19th. A reconnoissance of the Federal cavalry advanced to the Maryland shore of the Potomac on the evening of the 19th, where they skirmished with the rear guard of the rebels, and captured six guns. General Lee had safely withdrawn his army to the Virginia shore, and was slowly conducting his retreat to the banks of the Rappahannock.
Though the battle of Antietam can hardly be classed as a decisive victory on the part of the Federal forces, in a strictly military point of view, it was conclusive in its results; and General Lee retreated into Virginia with a full conviction of his inability to cope successfully on that ground with the army opposed to him, and thoroughly dispossessed of the confident expectation he had entertained, that the inhabitants would flock by thousands to his standard, when his forces should appear in their midst. Restricted as he had ever been in his commissariat, he had discovered that no dependence could be placed on obtaining supplies in a hostile territory, surrounded by a numerous and vigilant foe, whose well-disciplined and eager cavalry would surely cut off any supplies from the Shenandoah Valley, long before they reached the banks of the Potomac. With a loss of thirty thousand men, in killed, wounded and prisoners, he was compelled therefore to retrace his steps, which he was allowed to do, deliberately and securely.