By this time Jackson was approaching, and now the overwhelming forces of the enemy promised to crush the single corps; but Slocum's division of our Sixth corps was ordered to the relief of the Fifth corps, and arrived at four o'clock. The division was sent into the fight at once, each brigade being ordered separately to strengthen the weak points of the line. Thus, while the division fought bravely, and suffered equally in proportion with the Fifth corps, its incorporation with that corps for the time deprived it of the honors to which it was justly entitled.
Bartlett, with his brigade, went to the aid of Sykes, who was doubtfully struggling to hold his line; but who now, by the aid of the gallant brigade, was able to hurl the assailants back from his front.
The rebel line being completed, Longstreet, A. P. Hill, and Jackson all up with their troops, a general advance was made.
The charge was made with great spirit, the rebels rushing over the open ground and floundering through the swamp under a most writhing fire, but the position of our forces was still too strong for them. At all points they were repulsed with terrible slaughter. First on the right, where Sykes' regulars, supported by Bartlett's brigade, withstood the onset of Hill, the disordered and disheartened confederates began to scatter in all directions.
One of the confederate generals reported that had not his men fallen back themselves he would have ordered it. "Men were leaving the field," says another general, "in every direction; two regiments ... were actually marching back under fire. Men were skulking from the woods in a shameful manner. The woods on our left and rear were full of troops in safe cover, from which they never stirred." Such was the effect of the reception given by the regulars. On our left they met with no better success. These, too, fell back in disorder. Now a desperate attempt was made against our center. The tactics with which we afterwards became so familiar on the part of the rebels were brought to bear. This was in massing troops against certain parts of our line and making desperate onslaughts with a view of breaking the line. The forces of Jackson, Hill and Longstreet threw themselves fiercely against our works, but without being able to drive our men back. Here it was that the First and Third brigades of Slocum's division saved the wavering line, and all the fury of the rebels was spent in vain. General Porter directed Newton's brigade to its position in the center; Newton leading the Thirty-first New York and Ninety-fifth Pennsylvania into the woods on one side, and the gallant Colonel Matheson with the Eighteenth and Thirty-second entering on the other, both in the face of a destructive fire. The rebels charged upon the brigade and gallantly the charge was met. Newton, seeing the rebel line waver before the fire of his men, shouted "Forward!" and the impetuous regiments cleared the woods and drove the rebels more than seven hundred yards. But the confederates, reinforced, pressed hard upon them with overwhelming numbers, and Newton demanded aid. Regiments from the New Jersey brigade rushed to the assistance of their brothers of the Third brigade, cheering as they advanced, and the position was held until the left wing of Porter's corps gave way. For two hours the conflict on this part of the line raged with terrible violence; the columns surging backward and forward, neither party being able to gain any permanent advantage. Never had we heard such volleys of musketry as now rolled along the borders of the swampy Chickahominy. Artillery was less used; a strip of pine woods intervening between the position occupied by some of our batteries and the rebel line preventing an accurate range. The attempt to break our center was abandoned, and now immense forces were brought against the left. The roar of battle became more loud than before. The thousand continuous volleys of musketry mingled in one grand tumultuous concert of death; while the booming of artillery, which was now brought more into action, shook the earth for miles around. Under the pressure of overwhelming numbers, one brigade gave way; and another on the extreme left, finding itself outflanked, fought its way back to the upper bridge, which had been partially destroyed during the night, and, crossing to the south side of the river, gathered its shattered regiments behind the breastworks of our Second division.
For two hours and a half the battle had raged fiercely on this part of the line, and as these brigades on the right gave way, the confusion spread all along. The rebels, seeing the disorder, and encouraged by their success on the left, came on with redoubled fury; and the whole line gave way, and fell back to some high grounds near the bridge. Here two brigades from the Third corps appeared as reinforcements, and the retreat was checked. The Fifth corps, with Slocum's division and the two brigades from the Third corps, were able to hold their position on the north side of the river till after dark.
But we had been beaten, and our losses were very great. Twenty-two pieces of artillery fell into the hands of the enemy. We lost two thousand prisoners, among whom was General Reynolds, commanding one of McCall's brigades; and our killed and wounded numbered about four thousand. The rebels had suffered greater losses in men, nine thousand five hundred having been killed or wounded. The action, on the part of the rebels, had been directed by General Lee in person, who was on the field during the whole action, controlling the movements of his troops, and attending to the details of the fight. On our part, the battle had been fought entirely under the direction of General Porter. General McClellan, believing he could best watch the movements at all parts of his line from a central position, had remained during the day at the Trent House, five miles from the scene of action, without deeming it necessary even to ride down to the river by the Woodbury bridge. (McClellan's Report.)
Meantime, while the battle raged with fury on the north side of the Chickahominy, there was active work in our own front. Our Second division, at Golden's Farm, was joined on the left by Sedgwick's division, of the Third corps. The two divisions held the key to Richmond; for, had the brave men composing them, under the leadership of such men as Smith and Sedgwick, been ordered to break through the rebel line, there was no power in their front to restrain them. The rebels, aware of this, and designing to prevent reinforcements from going to Porter, made frequent feints all along our line. Now with pickets, and anon, gathering a considerable force, they would advance upon some part of our works. From the nature of the ground, they could appear in large force at one point, then withdrawing, pass under cover of the woods and reappear at another point; thus keeping up the idea of a large force.
These skirmishes and the artillery duels had been kept up all day, to the annoyance of all.
Just at sunset, Davidson's brigade was ordered to cross the river, by the Woodbury bridge, to reinforce the Fifth corps. Preparations for moving were not complete, when the enemy opened a fierce fire of artillery and musketry. The idea of reinforcing the Fifth corps was at once abandoned, and we hastily took refuge from the howling missiles behind our breastworks. The artillery firing increased, until the scene became in the highest degree exciting.