On the same day Stuart succeeded with great difficulty in crossing the Potomac in the vicinity of Drainsville. He found our troops were now all north of this river, so that one object of his expedition —to detain them on the south side—had failed.
On the 28th he resumed his march, and as he passed close to Washington and Baltimore, he created considerable excitement in those cities. At Rockville he came upon a large train full of supplies, on its way to Frederick, Maryland, and captured it with its slender escort, after which he kept on in a northerly direction through Brookeville and Cookesville, travelling all night.
On this day the Adjutant-General at Richmond telegraphed for troops to be sent there at once from the Carolinas and elsewhere, for he estimated the Union forces at the White House at thirty thousand men, and considered the capital to be in great danger. Neither Davis nor his cabinet had the slightest desire to have any successes Lee might obtain at the North supplemented by their own execution at the South, a result they felt was not wholly improbable, in the excited state of public feeling at that time, if the city should be taken.
Lee, ignorant that Hooker was following him up, continued his aggressive advance. Early took prompt measures to seize the bridge over the Susquehanna at Wrightsville. If successful, he intended to cross over and amuse himself by destroying all direct connection between Philadelphia and the West, by railroad and telegraph. This done, he proposed to march along the north side of the river, capture Harrisburg and rejoin Ewell at Carlisle. As Gordon's brigade approached the bridge, after driving away some militia, they found it in flames, the Union commander at Columbia, Colonel Frick, having given orders for its destruction. Early gained some compensation for his failure in this respect by levying a contribution on York of one-hundred thousand dollars in cash; two hundred barrels of flour; thirty thousand bushels of corn; one thousand pairs of shoes, etc.
The Union army still remained in Frederick, with the left wing (three corps) under Reynolds thrown out toward the enemy, the Eleventh Corps under Howard at Boonsborough, the First Corps under my command at Middletown, supported by the Third Corps under Birney, two or three miles in rear, with Buford's division of cavalry holding the passes of South Mountain, the remainder of the cavalry being at Frederick.
Hooker thought it useless to keep a garrison of 10,000 men in a passive attitude at Harper's Ferry. I think he was quite right, for the war could not be decided by the possession of military posts or even of cities, for hostilities would never cease until one army or the other was destroyed. He therefore applied to Washington for permission to add this force to that of Slocum, in order that the two might act directly against Lee's communications by following up his rear while preserving their own line of retreat. Slocum had been already ordered there, for this purpose, but Halleck would not consent that the garrison of Harper's Ferry should be withdrawn under any circumstances, and positively refused Hooker's request. Hooker then considering himself thwarted in all his plans by the authorities at Washington, offered his resignation. It was promptly accepted, and Major-General George G. Meade, then the commander of the Fifth Corps, was assigned to the command of the Army of the Potomac. He was a general of fine intellect, of great personal bravery, and had had a good deal of experience in the war in handling troops, but had never achieved any brilliant success, or met with any serious reverse.
Upon ascertaining that the enemy were at York and Carlisle, Hooker had determined to throw out his different corps in a fan shape toward the Susquehanna, and advance in that direction with three corps on the left to defend that flank, in case Longstreet and Hill should turn East, instead of keeping on toward the North. At the same time it was his intention to have Slocum follow up Lee's advance, by keeping in his rear, to capture his trains and couriers, and to cut off his retreat should he be defeated.
General Meade's first order was for all the troops to concentrate in Frederick, where he proposed to have a grand review; but at the urgent remonstrance of General Butterfield, who had been Hooker's Chief of Staff, and who stated that this delay would give Lee time to cross the Susquehanna, and capture Harrisburg and Philadelphia, Hooker's orders were allowed to stand, with some exceptions. Meade appears to have disapproved all movements against Lee's line of retreat, for he ordered Slocum to rejoin the main army, and had the hardihood to break up the post at Harper's Ferry, in spite of the fact that Hooker had just been relieved from command for requesting permission to do so. The bulk of the garrison, under Major-General French, was directed to take post as a reserve at Frederick, when our forces moved forward. The general idea of our advance was to interpose between the enemy and Philadelphia if he went north, or between him and Baltimore and Washington in case he turned back. The orders at night were for Buford's division of cavalry to take post on the left flank, in the direction of Fairfield; Gregg's division on the right flank at Westminster; and Kilpatrick's division in advance of the centre, at Littlestown, the different corps to be posted between New Windsor and Emmetsburg.
Ewell's corps, as stated, were at Carlisle and York, Lee and
Longstreet's at Chambersburg, and Hill's corps at Fayetteville.
Lee was startled to learn from a countryman who came in on the 28th that Hooker was at Frederick, and not south of the Potomac, as he had supposed. He saw at once that his communications with Richmond, about which he was so solicitous, were greatly endangered, for the Union army could be formed to interpose between him and Williamsport, and still keep a safe line of retreat open to Washington. This might not be so great a misfortune to the enemy as regards food and forage; for he could probably live on the country for some time, by making predatory excursions in different directions, but when it came to obtaining fresh supplies of ammunition, the matter would become very serious. An army only carries a limited amount of this into the field and must rely upon frequent convoys to keep up the supply, which is constantly decreasing from the partial engagements and skirmishes, so prevalent in a hostile country.