The above manoeuvre was a great and unexpected or unsought risk, which, however, did not prove disastrous to the authors, but which might not again be ventured with similar results. A performance resembling it somewhat was enacted by the Rebels, but with very different issue. Early in the morning of the fourteenth A. P. Hill's corps left Warrenton, with orders to strike our rear at Bristoe Station. They moved up the Alexandria Turnpike to Broad Run Church, where they deflected on the road to Greenwich, and soon after struck our trail just behind the Third Corps, and eagerly pursued it. They were busy picking up stragglers and making some preparation for an attack upon our unsuspecting corps, when about noon General Warren's Second Corps, which was still behind, and bringing up the rear, made its appearance on the tapis, and materially changed the programme of the scene. Hill, finding himself nicely sandwiched or trapped by his own indiscretion, turned away from the retreating Third Corps, to fight, and, if possible, drive back the advancing Second. Warren's surprise in finding an enemy in force before him was not less than Hill's in finding one behind him; but it took Warren only about ten minutes to adjust himself to this unexpected position of affairs, when his batteries opened with such precision and effect, aided by the musketry of his infantry, that the Rebels fell back in much greater haste than they had advanced, leaving six of their guns in our hands and multitudes of dead, wounded, and prisoners. Five of the captured guns, still serviceable, were at once seized and used against the disappointed foe with telling power. One historian says, "Our loss in killed and wounded was about two hundred, including Colonel James E. Mallon, Forty-second New York, killed, and General Tile, of Pennsylvania, wounded; that of the enemy was probably four hundred (besides prisoners), including Generals Posey (mortally), Kirkland, and Cooke, wounded, and Colonels Ruffin, First North Carolina, and Thompson, Fifth North Carolina Cavalry, killed." This Bristoe fiasco was a stunning blow to the Rebel pursuit, and greatly checked their incursions. But our soldiers held the field so lately won only until dark, and "then followed the rest of the army, whose retreat they had so effectually covered."