This was the entire force carried by General Jackson into the fight, and these four thousand men, as the reader will perceive, bore the brunt of the first great assault of General McClellan.
Just as the light broadened in the east above the crest of mountains rising in rear of the Federal lines. General Hooker made his assault. His aim was plainly to drive the force in his front across the Hagerstown road and back on the Potomac, and in this he seemed about to succeed. Jackson had placed in front Ewell's division of twenty-four hundred men. This force received General Hooker's charge, and a furious struggle followed, in which the division was nearly destroyed. A glance at the casualties will show this. They were remarkable. General Lawton, division commander, was wounded and carried from the field; Colonel Douglas, brigade commander, was killed; Colonel Walker, also commanding brigade, was disabled; Lawton's brigade lost five hundred and fifty-four killed and wounded out of eleven hundred and fifty, and five out of six regimental commanders. Hayes's brigade lost three hundred and twenty-three out of five hundred and fifty, and all the regimental commanders. Walker's brigade lost two hundred and twenty-eight out of less than seven hundred, and three out of four regimental commanders; and, of the staff-officers of the division, scarcely one remained.
In an hour after dawn, this heavy slaughter had been effected in Ewell's division, and the detailed statement which we have given will best show the stubborn resistance offered by the Southern troops. Still, they were unable to hold their ground, and fell back at last in disorder before General Hooker, who pressed forward to seize the Hagerstown road and crush the whole Confederate left. He was met, however, by Jackson's Old Division of sixteen hundred men, who had been held in reserve; and General Lee hastened to the point threatened Hood's two small brigades, one of which. General Hood states, numbered but eight hundred and sixty-four men. With this force Jackson now met the advancing column of General Hooker, delivering a heavy fire from the woods upon the Federal forces. In face of this fire they hesitated, and Hood made a vigorous charge, General Stuart opening at the same time a cross-fire on the enemy with his horse-artillery. The combined fire increased their disorganization, and it now turned into disorder. Jackson seized the moment, as always, throwing forward his whole line, and the enemy were first checked, and then driven back in confusion, the Confederates pursuing and cheering.
The first struggle had thus resulted in favor of the Confederates—with about six thousand they had repulsed eighteen thousand—and it was obvious to General McClellan that, without reinforcements, his right could not hold its ground. He accordingly, just at sunrise, sent General Mansfield's corps to the aid of General Hooker, and at nine o'clock General Sumner's corps was added, making in all forty thousand men.
The appearance of affairs at this moment was discouraging to the Federal commander. His heavy assaulting column had been forced back with great slaughter; General Hooker had been wounded and borne from the field; General Mansfield, while forming his line, had been mortally wounded; and now, at nine o'clock, when the corps of General Sumner arrived, the prospect was depressing. Of the condition of the Federal forces, General Sumner's own statement conveys a very distinct conception: "On going upon the field," said General Sumner, before the war committee, "I found that General Hooker's corps had been dispersed and routed. I passed him some distance in the rear, where he had been carried wounded, but I saw nothing of his corps at all, as I was advancing with my command on the field. I sent one of my staff-officers to find where they were, and General Ricketts, the only officer we could find, stated that he could not raise three hundred men of the corps." General Mansfield's corps also had been checked, and now "began to waver and break."
Such had been the result of the great Federal assault, and it was highly creditable to the Confederate arms. With a comparatively insignificant force, Jackson had received the attack of the entire Federal right wing, and had not only repulsed, but nearly broken to pieces, the large force in his front.
The arrival of General Sumner, however, completely changed the face of affairs, and, as his fresh troops advanced, those which had been so roughly handled by Jackson had an opportunity to reform. This was rapidly effected, and, having marshalled his troops, General Sumner, an officer of great dash and courage, made a vigorous charge. From this moment the battle began to rage with new fury. General Lee had sent to the left the brigades of Colquitt, Ripley, and McRae, and with these, the troops of Hood, and his own shattered division, Jackson presented a stubborn front, but his loss was heavy. General Starke, of the Old Division, was killed; the brigade, regimental, and company officers fell almost without an exception, and the brigades dwindled to mere handfuls.
Under the great pressure, Jackson was at length forced back. One of General Sumner's divisions drove the right of the Confederates beyond the Hagerstown road, and, at this moment the long struggle seemed ended; the great wrestle in which the adversaries had so long staggered to and fro, advancing and retreating in turn, seemed at last virtually decided in favor of the Federal arms.
This was undoubtedly the turning-point of the battle of Sharpsburg, and General Lee had witnessed the conflict upon his left with great anxiety. It was impossible, however, to send thither more troops than he had already sent. As will be seen in a moment, both his centre and right were extremely weak. A.P. Hill and General McLaws had not arrived from Harper's Ferry. Thus the left had been reënforced to the full extent of Lee's ability, and now that portion of his line seemed about to be crushed.
Fortunately, however, General McLaws, who had been delayed longer than was expected by General Lee, at last arrived, and was hurried to the left. It was ten o'clock, and in that one hour the fighting of an entire day seemed to have been concentrated. Jackson was holding his ground with difficulty when the divisions of McLaws and Walker were sent to him. As soon as they reached the field, they were thrown into action, and General Lee had the satisfaction of witnessing a new order of things. The advance—it might rather be called the onward rush—of the Federal line was checked. Jackson's weary men took fresh heart; that great commander promptly assumed the offensive, and, advancing his whole line, drove the enemy before him until he reoccupied the ground from which General Sumner had forced him to retire.