At the earliest dawn of morning on Saturday, 2nd of May, the enemy executed a manœuvre to lead the Union generals to the belief that they were evacuating, and deceived some of the corps commanders; but General Hooker, perceiving that the movement of their wagon trains was nothing more than a blind, directed General Sickles to plant a battery at a point commanding the moving train, and shell it. This being done, the train was thrown into complete disorder, and obliged to move back. To obtain the road over which the wagon trains had been moving, General Sickles ordered General Birney to advance his troops and take possession of a hill opposite the road. This was done after much difficulty. Captain Seely’s battery, of the Fourth United States artillery was charged up the hill in such haste as did not leave it even time to procure a supply of ammunition. It, however, worked brilliantly, till obliged to retire to replenish its caissons. A charge upon the rebel rifle-pits was now ordered, which resulted in the stoppage of their musketry firing, and gave about a hundred of their occupants into the hands of General Birney. With much skirmishing, and now and then severe shelling, the advance was continued till Birney’s division occupied the extreme brow of the hill. The rebels had been driven back over a mile, and the Federals held a most commanding position. After sending to headquarters many times for reinforcements, General Sickles at last obtained permission to advance General Whipple’s division to the aid of General Birney. Later, the Eleventh corps was directed to advance, and join its flank to Birney’s right; the Twelfth was to the left; and a general advance was ordered. The skirmishers of both armies immediately became engaged; the rebels gradually falling back. The soldiers of the Union charged boldly upon the rebels, and the engagement immediately became general. The enemy held their ground obstinately, fighting with most determined bravery; as usual, owing to the skillful generalship of the rebel generals, the enemy were in greater force than the Unionists wherever they met, although the number of Lee’s army was greatly inferior to that of Hooker. Borne down with heat and fatigue, the national troops began to show evidences of faltering. To carry the heights in their present condition was impossible, and General Williams ordered the retreat of his division. But the most painful part of the defeat was yet to come.