animals and supply wagons, and a part of the artillery crossed on the bridge on June 15 and 16. By the morning of June 17, more than 100,000 men, 5,000 wagons and ambulances, 56,000 horses and mules, and 2,800 head of cattle had crossed the river without alerting the Confederates. Before the entire army had crossed, Smith's XVIII Corps, followed by Hancock's II Corps, became engaged in the next campaign, Richmond–Petersburg (the siege of Petersburg), with attacks on Petersburg on June 15. Trevilian Station (June 11–12) Sheridan and two cavalry divisions left on June 7 for their raid against the Virginia Central Railroad and to link up with Hunter. In the first two days, plagued by heat and humidity, and by irregular mounted raiding parties, the Federal column advanced only about 40 miles. Scouts passed word of Sheridan's movements to Maj. Gen. Wade Hampton, the senior Confederate cavalry commander, on the morning of June 8. He correctly guessed that the Union targets were the railroad junctions at Gordonsville and Charlottesville, and knew that he would have to move quickly to block the threat. His division and the division of Maj. Gen. Fitzhugh Lee began to move in pursuit early on June 9. Although the Federals had a two-day head start, the Confederates had the advantage of a shorter route (about 45 miles versus 65) and terrain that was more familiar to them. By the evening of June 10, both forces had converged around Trevilian Station. The Federals had crossed over the North Anna River at Carpenters Ford and camped at locations around Clayton's Store. At dawn on June 11, Hampton devised a plan in which he would split his divisions across the two roads leading to Clayton's Store and converge on the enemy at that crossroads, pushing Sheridan back to the North Anna River. Hampton took two of his brigades with him from Trevilian with his third remaining on his left to prevent flanking. The other division, under Fitzhugh Lee, was ordered to advance from Louisa Court House, making up the right flank. While the Confederates began their advance, Sheridan started his. Two brigades of Brig. Gen. Alfred T. A. Torbert's division moved down the road to Trevilian Station while a third advanced toward Louisa Court House. The first contact occurred on the Trevilian Road as the South Carolinians of Brig. Gen. Matthew C. Butler's brigade clashed with Brig. Gen.