about 5 P. M. Line of battle was at once formed, and two brigades were thrown forward to attack and ascertain the strength of the position. A cold and drenching rainstorm drove in the faces of our troops as they advanced and gallantly engaged. They were subsequently supported, and the conflict was obstinately maintained until dark, when the enemy retreated, having lost two general officers, one of whom—Major General Kearney—was left dead on the field. Longstreet's command arrived after the action was over, and the next morning it was found that the retreat had been so rapid that the attempt to intercept was abandoned. The proximity of the fortifications around Alexandria and Washington was enough to prevent further pursuit. Our army rested during the 2d near Chantilly, the retreating foe being followed only by our cavalry, who continued to harass him until he reached the shelter of his entrenchments. In the series of engagements on the plains of Manassas more than seven thousand prisoners were taken, in addition to about two thousand wounded left in our hands. Thirty pieces of artillery, upward of twenty thousand stands of small arms, numerous colors, and a large amount of stores, besides those taken by General Jackson at Manassas Junction, were captured. Major General Pope in his report says:
The whole force that I had at Centreville, as reported to me by the corps commanders, on the morning of the 1st of September was as follows: McDowell's corps, 10,000 men; Sigel's corps, about 7,000; Heintzelman's corps, about 6,000; Reno's, 6,000; Banks's, 5,000; Sumner's, 11,000; Porter's, 10,000; Franklin's, 8,000—in all, 63,000 men. . . . The small fraction of 20,500 men was all of the 91,000 veteran troops from Harrison's Landing which ever drew trigger under my command.Our losses in the engagement at Manassas Plains were considerable. The number killed was 1,090; wounded, 6,154—total, 7,244. The loss of the enemy in killed, wounded, and missing was estimated between 15,000 and 20,000. The strength of our army in July and September is stated on a preceding page.