August 31, the march was resumed early in the morning, the Brigade reaching Centreville about noon, joining the other troops of General Sumner’s corps, and taking its place in the line. Soon after, the whole corps moved up and took the front line of the army, notwithstanding the fact that the men were nearly destitute of ammunition.
The remains of General Pope’s army had fallen back to this place in a disorganized condition, and on the following day commenced to retreat toward Washington, Sumner and Franklin protecting their rear. Here our comrades of the Twenty-ninth, who were stationed on a high hill, that afforded them an extended view of the country, witnessed another wholesale destruction of stores and supplies. It was not an exact repetition of Savage’s Station, yet so closely resembled it, as to make the sight a familiar one, and call up in their minds many recollections of the retreat from Richmond.
During the afternoon of September 1, General Sumner’s corps were the only Union troops that remained on the field. The enemy were close at hand, the Fifth New Hampshire, indeed, being at that moment skirmishing with them only a few hundred yards from the main body of our troops. The order for the corps to fall back had been given; but the brave old commander was in no haste about it, and for the purpose of inspiring his men with confidence, and teaching them habits of coolness, he caused the various divisions to execute the order (to fall back) by the regular tactic formations. The ground chanced to be favorable for this plan. The veteran General sat upon his horse in the midst of his troops, giving his commands in a cool and deliberate manner, that excited the admiration of his soldiers. It was altogether a novel scene,—an army on drill in the face of the enemy; the various movements were skilfully performed, and were so planned as always to keep one of the divisions in line of battle facing the enemy, and covering the other troops in the rear. All the while these evolutions were going on,—which occupied some hours,—the corps was slowly retiring.
It was late in the night before the Brigade commenced to fall back toward Washington. Earlier in the evening, the enemy, under A. P. Hill and Jackson, had attacked a portion of our retreating column; and while the contest was raging fiercely, a violent tempest arose, “the artillery of earth meeting with a response in the still heavier thunder of the skies.” This was a repetition of another of the events at Savage’s Station, as was also the gloomy, comfortless night and the hardly less gloomy march that followed. While on the march that night, a long ambulance train, filled with wounded, moved along over the road, and in halting to give the train an opportunity to pass, the regiment became divided, nearly an hour elapsing before the two portions managed to unite.
On Tuesday morning, September 2, the Brigade halted two miles west of Fairfax Court-house. The regiment was here thrown out in the rear as skirmishers, and were shortly after attacked by the Confederate cavalry. Pettit’s battery, being in position near them, fired a few shots at the enemy, and put him to flight. At three o’clock in the afternoon the regiment was relieved, and at five o’clock marched with the Brigade to Fall’s Church, and from there to Langley’s, reaching the latter place during the night. The distance marched this day was not far from eighteen miles, and proved to be so severe a strain upon the already overtaxed men, that many were unable to keep up, and not a few were made dangerously sick, Lieutenant Hathaway of Company C falling senseless by the way and never afterward being able to rejoin his command.
On the afternoon of the 2d, the Brigade passed the Potomac on Chain Bridge, marched through Georgetown, and from there to Tenallytown, about six miles from Washington. This was a pleasant little village. The men had a good, clean camping-ground, but no tents. The absence of tents, however, had ceased to be counted as a discomfort. The soldiers had long been in that state of mind which caused them to look upon a green pasture or field with feelings of supreme contentment. The Brigade remained in Tenallytown till Friday the 5th, and then went to Rockville, nine miles distant. The men were compelled to march in the fields, General Banks’s corps, the artillery, and trains taking the road. On the 6th, Sumner’s corps passed through Rockville, and formed a line of battle two miles north of the town, with Banks’s corps on the left. There was some skirmishing during the day between the Union and Confederate cavalry. No further movement of importance was made until the 9th, and then the corps performed a distance of about ten miles, stopping for the night near Seneca Mills. The whole army was moving in the same direction, though by different roads.
The marches were not at this time very long nor forced; the country through which the army moved was very picturesque and fruitful; the fields were filled with corn, and from these the soldiers had many delicious meals,—roasting the milky corn, gathering peaches and apples from the well-laden orchards, and not seldom supping upon fresh pork (purchased of course of the country people).
The towns of Middlebrook, Clarksburg, and Hyattsville were successively passed on the journey between the 10th and 12th, at the latter place being only a few hours behind the rear guard of the enemy. On the 13th, our army marched through Frederick City, and were joyfully received by the people. Only three days before, the city had been occupied by the armies of Lee and Jackson; and notwithstanding the presence of the enemy, the loyal people avowed their sentiments with great freedom. It is reported that the pious General Jackson, while remaining in the city over Sunday of the 7th, attended divine services at the church of the Rev. Dr. Zacharias, and that the undaunted clergyman, in a firm voice, prayed for the President of the United States in the presence of the Confederate General. The treasonable proclamation of General Lee, issued about this time, met with a cold response; and although some recruits were obtained for his army, the majority of them shortly after deserted and returned to their homes. The ragged and filthy appearance of the Confederate soldiers, many of whom were barefooted, tended to disgust even the Secessionists (who had not sufficient moral courage to follow the fortunes of the brave soldiers of the South); and when the Southern army retired, and the Patriot army followed, all classes were about equally jubilant.
Upon leaving Frederick City, the Confederates retreated towards Sharpsburg. Twelve miles from Frederick City, and three from Middletown, is Turner’s Gap, through which runs the Middletown Road. This Gap is one of several passes in the South Mountains, here nearly one thousand feet high. At this place a large force of the enemy made a determined stand, and on the 14th, a desperate battle was fought, General Reno’s Ninth Army Corps being conspicuously engaged, and that gallant General losing his life. The battle resulted in a complete Union victory.
General Richardson’s division arrived at the base of the mountain at nine o’clock in the evening of this day, and the men slept on their arms all night. On the morning of the 15th, the division passed up the mountain, the Irish Brigade being in advance. The enemy had fled during the night, leaving their dead unburied and their wounded uncared for. The ground in many places was thickly strewn with the dead and wounded of both armies; one poor fellow (a Confederate) was still alive, having been shot through the head, the ball coming out at the eye. Thirty-four of the enemy’s dead were counted in one spot only a few rods square. The place where the Pennsylvania Reserves (“Bucktails”) charged up the precipitous mountain-side, bore sad evidence of the bloody character of the battle. The dead and mangled bodies of both friend and foe were in some places mingled together; the wounded, lying among rocks and deep thickets, were calling aloud to the passing soldiers for water and aid. The summit and westerly side of the mountain, down which the Confederates fled, gave proof of the extreme panic which seized them at the close of the battle; guns, blankets, and equipments were scattered about the ground in great profusion. It was very encouraging to our soldiers to witness these indications of the retreat of their valiant old enemy of the Peninsula, who, less than two months before, had put them in the same awkward plight, and caused them untold hardships.