Ransom, with a brigade of McArthur's division of the 17th corps (McPherson's), had crossed the river at Grand Gulf a few days before, and was coming up on their right flank. Neither Logan nor I knew that we had cut off the retreat of the enemy. Just at this juncture a messenger came from Hovey, asking for more reinforcements. There were none to spare. I then gave an order to move McPherson's command by the left flank around to Hovey.
This uncovered the rebel line of retreat, which was soon taken advantage of by the enemy.
During all this time, Hovey, reinforced as he was by a brigade from Logan and another from Crocker, and by Crocker gallantly coming up with two other brigades on his right, had made several assaults, the last one about the time the road was opened to the rear. The enemy fled precipitately. This was between three and four o'clock. I rode forward, or rather back, to where the middle road intersects the north road, and found the skirmishers of Carr's division just coming in. Osterhaus was farther south and soon after came up with skirmishers advanced in like manner. Hovey's division, and McPherson's two divisions with him, had marched and fought from early dawn, and were not in the best condition to follow the retreating foe. I sent orders to Osterhaus to pursue the enemy, and to Carr, whom I saw personally, I explained the situation and directed him to pursue vigorously as far as the Big Black, and to cross it if he could;
Osterhaus to follow him. The pursuit was continued until after dark.
The battle of Champion's Hill lasted about four hours, hard fighting, preceded by two or three hours of skirmishing, some of which almost rose to the dignity of battle. Every man of Hovey's division and of McPherson's two divisions was engaged during the battle. No other part of my command was engaged at all, except that as described before. Osterhaus's and A. J. Smith's divisions had encountered the rebel advanced pickets as early as half-past seven. Their positions were admirable for advancing upon the enemy's line. McClernand, with two divisions, was within a few miles of the battle-field long before noon and in easy hearing. I sent him repeated orders by staff officers fully competent to explain to him the situation. These traversed the wood separating us, without escort, and directed him to push forward; but he did not come. It is true, in front of McClernand there was a small force of the enemy and posted in a good position behind a ravine obstructing his advance; but if he had moved to the right by the road my staff officers had followed the enemy must either have fallen back or been cut off. Instead of this he sent orders to Hovey, who belonged to his corps, to join on to his right flank. Hovey was bearing the brunt of the battle at the time. To obey the order he would have had to pull out from the front of the enemy and march back as far as McClernand had to advance to get into battle and substantially over the same ground. Of course I did not permit Hovey to obey the order of his intermediate superior.
We had in this battle about 15,000 men absolutely engaged. This excludes those that did not get up, all of McClernand's command except Hovey. Our loss was 410 killed, 1,844 wounded and 187 missing. Hovey alone lost 1,200 killed, wounded and missing--more than one-third of his division.
Had McClernand come up with reasonable promptness, or had I known the ground as I did afterwards, I cannot see how Pemberton could have escaped with any organized force. As it was he lost over three thousand killed and wounded and about three thousand captured in battle and in pursuit. Loring's division, which was the right of Pemberton's line, was cut off from the retreating army and never got back into Vicksburg. Pemberton himself fell back that night to the Big Black River. His troops did not stop before midnight and many of them left before the general retreat commenced, and no doubt a good part of them returned to their homes. Logan alone captured 1,300 prisoners and eleven guns.
Hovey captured 300 under fire and about 700 in all, exclusive of 500 sick and wounded whom he paroled, thus making 1,200.
McPherson joined in the advance as soon as his men could fill their cartridge-boxes, leaving one brigade to guard our wounded. The pursuit was continued as long as it was light enough to see the road. The night of the 16th of May found McPherson's command bivouacked from two to six miles west of the battlefield, along the line of the road to Vicksburg. Carr and Osterhaus were at Edward's station, and Blair was about three miles south-east; Hovey remained on the field where his troops had fought so bravely and bled so freely. Much war material abandoned by the enemy was picked up on the battle-field, among it thirty pieces of artillery. I pushed through the advancing column with my staff and kept in advance until after night.
Finding ourselves alone we stopped and took possession of a vacant house. As no troops came up we moved back a mile or more until we met the head of the column just going into bivouac on the road. We had no tents, so we occupied the porch of a house which had been taken for a rebel hospital and which was filled with wounded and dying who had been brought from the battle-field we had just left.
While a battle is raging one can see his enemy mowed down by the thousand, or the ten thousand, with great composure; but after the battle these scenes are distressing, and one is naturally disposed to do as much to alleviate the suffering of an enemy as a friend.