The 1st North Carolina suffered 50% casualties (133 men killed, wounded, or captured) and also lost its commander, Col. Montford Stokes. General Ripley himself survived unscathed, but came within inches of being decapitated by an artillery shell. Ripley's other two regiments, the 3rd North Carolina and 48th Georgia, were to the rear of the 1st North Carolina and 44th Georgia; their losses were lighter. Union casualties around Ellerson's Mill were small, only 40 men total were killed or wounded in the 7th Pennsylvania Reserves and 12th Pennsylvania Reserves, which were defending this sector of the battlefield. The 13th Pennsylvania Reserves lost 75 men, the highest total number of any Union outfit. Some 20 years after the battle, D.H. Hill wrote "The attacks on the Beaver Dam entrenchments, on the heights of Malvern Hill, at Gettysburg, were all grand, but of exactly the kind of grandeur the South could not afford." As darkness fell, the rest of D.H. Hill's division came up followed by Longstreet, while on the Union side, George Morrell's division arrived and relieved McCall, whose men were nearly out of ammunition. There was not enough daylight remaining to deploy D.H. Hill and Longstreet's divisions. Jackson did not attack, but his presence near Porter's flank caused McClellan to order Porter to withdraw after dark behind Boatswain's Swamp, five miles (8 km) to the east. McClellan was concerned that the Confederate buildup on his right flank threatened his supply line, the Richmond and York River Railroad north of the Chickahominy, and he decided to shift his base of supply to the James River (he also believed that the demonstrations by Huger and Magruder showed that he was seriously outnumbered). This was a strategic decision of grave import because it meant that, without the railroad to supply his army, he had to abandon his siege of Richmond. Overall, the battle was a Union tactical victory, in which the Confederates suffered heavy casualties and achieved none of their specific objectives due to the seriously flawed execution of Lee's plan. Instead of over 60,000 men crushing the enemy's flank, only five brigades, about 15,000 men, had seen action. Their losses were 1,484 versus Porter's 361. Lee's staff recalled that he was "deeply, bitterly disappointed" by Jackson's performance, but communication breakdowns, poorly written orders from Lee, and bad judgment by most of Lee's other subordinates were also to blame.