realizing they had missed their objective sometime in the early morning hours of June 30. Backtracking toward Glendale, the division arrived near dawn, where it halted on its march to rejoin Porter, awaiting new orders. The gap in the Union line created by Sedgwick was noticed and plugged by McCall's three brigades after McCall and his brigadiers soon realized, to their genuine surprise, that nothing stood between them and the advancing divisions of Longstreet and Hill coming from the direction of Richmond. To the south, Holmes's inexperienced troops (from his Department of North Carolina, attached to the Army of Northern Virginia) made no progress against Porter at Turkey Bridge and Malvern Hill and were repulsed by artillery fire and by the Federal gunboats Galena and Aroostook on the James. At 2 p.m., while Longstreet and Hill waited for the sounds of Huger's expected opening assault, Longstreet interpreted distant unidentified cannon fire as the signal to begin the coordinated attack. He opened upon McCall's line with his artillery, and McCall's artillery soon returned counter-battery fire. Nearby, Lee, Longstreet, and visiting Confederate President Jefferson Davis were conferring on horseback when they came under heavy artillery fire (presumably blind fire from the Parrott rifles of McCall's Pennsylvania Artillery units), wounding two men and killing three horses. A. P. Hill, commanding in that sector, ordered the president and senior generals to the rear. Longstreet attempted to silence the batteries of Federal Parrott rifles firing in his direction, but long-range artillery fire proved to be inadequate to the task. He ordered Colonel Micah Jenkins to charge the batteries, soon followed by his other brigades mobilizing along the line, which brought about a general fight around 4 p.m. Although belated and not initiated in the coordinated fashion as Lee planned, the combined assaults by the divisions of A. P. Hill and Longstreet (under Longstreet's overall command) would be the only units to follow Lee's order to attack the main Union concentration. Longstreet's 20,000 men were not joined by the Confederate divisions of Huger or Jackson, despite their concentration within a 3-mile (4.8 km) radius. Longstreet's troops assaulted the disjointed Union line of 40,000 men, arranged in a 2-mile (3.2 km) arc north and south of the Glendale intersection, but the brunt of the fighting centered on the position held by McCall's Pennsylvania Reserves division (Third Division of the V Corps), 6,000 men just west of Frayser's