During this expedition Kenly's brigade of the Eighth Corps served with the Nineteenth.
As soon as Early's withdrawal from Maryland had quieted all apprehensions for the safety of Washington, the orders that had met the advance of the Nineteenth Corps at Hampton Roads were recalled, and, reverting to his original intention, Grant sent the detachments of the corps as they arrived up the James River to Bermuda Hundred to join the right wing of his armies under Butler. Indeed, at the moment of its arrival at Poolesville, the First division had been ordered to take the same destination, but this the movements of the contending armies prevented. The first of the troops to land at Bermuda Hundred was the 15th Maine on the 17th of July. It was at once sent to the right of the lines before Petersburg, and within the next ten days there were assembled there parts of four brigades—McMillan's and Currie's of the First division, and Birge's and Molineux's of Grover's. Part of Currie's brigade was engaged, under Hancock, in the affair at Deep Bottom on the north bank of the James on the 25th of July, losing eighteen killed and wounded and twenty-four prisoners. The work and duty in the trenches and on the skirmishing line were hard and constant, reminding the men of their days and nights before Port Hudson, but this was not to last long, and the loss was light.(2)
On the 20th of July at Carter's Farm, three miles north of Winchester, Averell, who was following Early, met and routed Ramseur, who had been sent back to check the pursuit. Early continued his retreat to Strasburg on the 22d, but when the next day he learned that Wright was gone, he turned back to punish the weak force under Hunter, and on the 24th overwhelmed Crook at Kernstown. Crook retreated through Martinsburg into Maryland, and marching by Williamsport and Boonsborough, took post at Sharpsburg, while Averell stayed at Hagerstown to watch the upper fords of the Potomac.
To break up the Baltimore and Ohio railway and to ravage the borders of Pennsylvania were favorite ideas with Early. He now entered with zest on the unopposed gratification of both desires, and while he himself bestrode the railway at Martinsburg with his army engaged in its destruction, he sent McCausland with his own brigade of cavalry and Bradley Johnson's on the famous marauding expedition that culminated in the wanton burning of Chambersburg in default of an impossible ransom, and at last resulted in the flight of McCausland's whole force, with Averell at his heels, and its ultimate destruction or dispersion by Averell, after a long chase, at Moorefield far up the south branch of the Potomac.
When on the 23d of July he saw Wright back at Washington and Early at Strasburg in retreat, as was imagined, up the valley, Grant partly changed his mind about recalling the troops he had spared for the defence of Washington, and determining to content himself with Wright's corps, directed Emory to stay where he was. Emory now had 253 officers and 5,320 men for duty.
As one turn of the wheel had given the Nineteenth Corps to Butler, restoring to his command some of the regiments that had gone with him to the capture of New Orleans, so the next turn was to bring the corps under Augur, who since leaving Louisiana had been in command of the department of Washington. So at least run the orders of the 23d of July, yet hardly had Emory reported his division to Augur, when the whole arrangement was suddenly broken up, and the army that had just marched back to Washington with Wright was once more hurried off to meet what was supposed to be a fresh invasion by Early. In fact Early was quietly reposing at Bunker Hill, where he easily commanded the approaches and debouches of the Shenandoah valley, the fords of the Potomac, from Harper's Ferry to Williamsport, and the whole line of the railway across the great bend of the Potomac.
By this time Grant had found out that it often took twenty-four hours to communicate with Washington by telegraph, and that it was consequently impossible to control from the James the movements of his forces on the upper Potomac. On his suggesting this, the government confided to Halleck the direction of Wright's operations against Early. The Sixth Corps marched from Tennallytown on the morning of the 26th of July, and immediately afterwards the Nineteenth Corps broke up its camp near the chain bridge and followed the Sixth. The line of march followed the road to Rockville, where Wright divided the column, sending a detachment to the left by way of Poolesville, while the main body pursued the direct road towards Frederick. Emory encamped that night on the Frederick road, four miles north of Rockville, after a march of nineteen miles. The next day, the 27th of July, Emory, leading the column, marched at three in the morning, moved fifteen miles, and encamped beyond Hyattstown. On the 28th Emory took the road at five, marched to Monocacy Junction, where the Sixth Corps crossed the Monocacy, then filed to the right, and crossed at the upper ford, and passing through Frederick went into bivouac four miles beyond. The distance made was thirteen miles. On the 29th, an intensely hot day, Emory marched at eight, following the Sixth Corps, crossed the Potomac at Harper's Ferry, marched nineteen miles, and went into bivouac at Halltown. Here Wright was joined by Crook, who came from Sharpsburg by way of Shepherdstown.
It was on the 30th of July that McCausland burned Chambersburg. In the confusion caused by his rapid movements, Halleck imagined that Early's whole force was in Pennsylvania. Therefore he ordered Wright back into Maryland, first to Frederick and them to Emmettsburg, to hold the passes of the South Mountain against the supposed invader. About noon Wright faced about, taking Crook with him, and recrossed the Potomac. Toward evening Crook and Wright covered the passes, while Emory crossed the Catoctin and at one in the morning of the 31st halted near Jefferson after a hard day's march of thirteen miles, during which the men and animals of all the corps suffered terribly from the heat and dust, added to the accumulated fatigue they had already undergone from a succession of long days and short nights. Reveille was sounded at five o'clock, and at six the march was resumed. Emory passed through Frederick, moved about two miles on the Emmettsburg road and went into bivouac, having made thirteen miles during the day. The army was now concentrated at Frederick, holding the line of the Monocacy and observing the passes of the South Mountain. Fortunately for the men and horses, Halleck now learned from Couch, who commanded in Pennsylvania, with rather less than a handful of troops, the exact dimensions of McCausland's raid. Accordingly Wright's troops were allowed to rest where they were.
Grant ordered up a division of cavalry from the Army of the Potomac, and on the 4th of August set out in person for Frederick, avoiding Washington, to see for himself just what the situation was, and to make better arrangements for the future. On the 5th of August he joined Hunter on the Monocacy, and at once ordered him to take Wright, Emory, and Crook across the Potomac, to find the enemy, and to attack him.
Grover's division and the parts of Emory's that had been at Bermuda Hundred embarked on the James on the 31st of July, and passed up the Potomac to Washington, but too late to join Emory on the Monocacy. Thus, before beginning the new movement, Emory had of his own division 4,600 effective and eight regiments of Grover's, numbering 2,750. These, being part of four brigades, were temporarily organized into two, and as Grover himself had not yet joined, their command was given to Molineux.