General McClellan, waiting near the round-house at Alexandria, were hurried forward to the scene of action where Pope was struggling with Jackson and Ewell. Pope had counted upon the assistance of these reenforcements in making the forward movement by which he expected to hold Lee back. The old bogey of leaving the National Capital defenseless set up a vacillation in General Halleck's mind and the troops were held overlong at Alexandria. Had they been promptly forwarded, “Stonewall” Jackson's blow at Manassas Junction could not have been struck. At the news of that disaster the troops were hurriedly despatched down the railroad toward Manassas. But Pope was already in retreat in three columns toward that point, McDowell had failed to intercept the Confederate reinforcements coming through Thoroughfare Gap, and the situation had become critical. General Taylor, with his brigade of New Jersey troops, was the first of McClellan's forces to be moved forward to the aid of Pope. At Union Mills, Colonel Scammon, commanding the First Brigade, driven back from Manassas Junction, was further pressed by the Confederates on the morning of August 27th. Later in the day General Taylor's brigade arrived by the Fairfax road and, crossing the railroad bridge, met the Confederates drawn up and waiting near Manassas Station. A severe artillery fire greeted the Federals as they emerged from the woods. As General Taylor had no artillery, he was obliged either to retire or charge. He chose the latter. When the Confederate cavalry threatened to surround his small force, however, Taylor fell back in good order across the bridge, where two Ohio regiments assisted in holding the Confederates in check. At this point, General Taylor, who had been wounded in the retreat, was borne past in a litter. Though suffering much, he appealed to the officers to prevent another Bull Run. The brigade retired in good order to Fairfax Court House, where General Taylor died of his wounds a short time afterward.