THE SUCCESSES AND FAILURES OF CHANCELLORSVILLE.
BY ALFRED PLEASANTON, BREVET MAJOR-GENERAL, U. S. A.

IN the latter part of April, 1863, General Hooker decided to undertake an offensive campaign with the Army of the Potomac against the Army of Northern Virginia, under General Lee. At this time the two armies faced each other: "Lee's, numbering about 60,000 men, being at Fredericksburg, and the Army of the Potomac, numbering about 130,000 men, at Falmouth, on the north side of the Rappahannock River opposite Fredericksburg. Hooker directed three corps of the army, the First, the Third, and the Sixth, comprising 59,000 men, under the command of General Sedgwick, to cross the Rappahannock River below Fredericksburg and hold Lee's army in that position, while he himself moved secretly and with celerity three corps, the Fifth, the Eleventh, and the Twelfth, numbering 42,000 men, up the river, crossing it and concentrating them at Chancellorsville, ten miles west of Fredericksburg, with the purpose of moving down upon General Lee's army to take it in rear and flank - two divisions of the Second Corps being placed to cover Banks's Ford, the third division being left at Falmouth, while a brigade and battery were stationed at United States Ford to facilitate the crossing. The Cavalry Corps, with the exception of one small brigade of three regimetns and a battery of horse artillery, which was left under my command with the army, was ordered under the command of General Stoneman to make a raid in rear of Lee's army, and destroy his railroads and his communications with Richmond.**

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** This corps did great service by drawing off General Lee's cavalry, under General J. E. B. Stuart, to Brandy Station and Culpeper, thus depriving General Lee of their services; for General Hooker moved the three corps with him with such celerity that they passed between Stuart and Lee's army, and Stuart could not get through to communicate to Lee what was going on. It will be seen later on what a loss this was to Lee, and what a great advantage it was to the Army of the Potomac. - A. P.
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UNION CAVALRY-MAN'S HAT.

PARADE AT FALMOUTH OF THE 110TH PENNSYLVANIA VOLUNTEERS. FROM A PHOTOGRAPH. This regiment (of Whipple's division, Third Corps) with the 84th Pennsylvania performed desperate service near Fairview on Sunday morning, May 3d, the 84th losing 215 men and the 110th losing 45 men. - EDITORS.