- Cedar Mountain -- Rappahannock -- Gainesville -- Groveton -- Second Bull Run -- South Mountain -- Antietam -- Fredericksburg -- Fitzhugh's Crossing -- Chancellorsville -- Gettysburg -- Mine Run.
The First Corps, when at its maximum, contained 46 regiments of infantry and 12 batteries of light artillery. It was organized in March, 1862, with three divisions,--King's, McCall's, and Franklin's. General Irwin McDowell was placed in command. When General McClellan moved the Army to the Peninsula, in April, 1862, McDowell's corps was left in Northern Virginia. Franklin's Division was ordered, soon after, to the Peninsula, where it was used in forming the Sixth Corps, its place in McDowell's command being taken by Ricketts' Division. In June, McCall's Division — the famous Pennsylvania Reserves--was also sent to the Peninsular Army, but upon the return of McClellan's forces to Washington, the Reserves rejoined McDowell, and fought under him at Second Bull Run. During the absence of the Army of the Potomac, McDowell was engaged in an active campaign which culminated in the battles around Manassas, the first general engagement in which the corps participated; loss, 595 killed, 2,853 wounded, and 2,021 missing, out of about 18,500 effective men. During the short time in which the army was under Pope, McDowell's Corps was officially designated as the Third Corps, Army of Virginia; but upon General McClellan's restoration to command it resumed its former and proper title,--the First Army Corps. While on the Maryland campaign the Corps was commanded by General Hooker, and the divisions by Generals Hatch, Ricketts and Meade; it numbered 14,850 men. It was prominently engaged at South Mountain, and also at Antietam, where it opened the battle, its casualties in that engagement amounting to 417 killed, 2,051 wounded and 122 missing. General John F. Reynolds was in command at Fredericksburg, with Doubleday, Gibbon and Meade as division generals; loss, 347 killed, 2,429 wounded, and 561 missing; total, 3,337. After this battle, the division of Pennsylvania Reserves--Meade's (3d) Division — was withdrawn from the front, and ordered to Washington that it might rest and recruit. This division, in addition to the battles of the First Corps, had served previously on the Peninsula, where it had encountered hard fighting and heavy losses. While on the Peninsula, the Reserves were attached to the Fifth Corps. When the division rejoined McDowell's Corps, at Manassas, it was with depleted ranks which were still further thinned by its subsequent battles. After taking its departure for Washington it never rejoined the First Corps, its