Oak Road Line near the junction with the Claiborne Road. Major General Bryan Grimes's division reinforced Brigadier General Edward L. Thomas's brigade which had to fill in part of the line formerly occupied by Scales's Brigade. The rain severely hampered the Union Army's mobile force's operations and ability to keep supplies moving. A large number of Warren's V Corps soldiers had to help the teamsters move horses and wagons and even to corduroy roads. Gravelly Run was swollen to three times its usual size and bridges and pontoons on Hatcher's Run were swept away. Skirmishers from the Union V Corps kept the Confederates in their White Oak Road Line between the Boydton Plank Road and Claiborne Road on March 30. Despite incomplete information and somewhat vague and conflicting orders from Meade and Grant, on Grant's order, Warren pushed the Union V Corps forward to strengthen his hold on a part of the Boydton Plank Road and the V Corps entrenched a line to cover that road from its intersection with Dabney Mill Road south to Gravelly Run. In the afternoon, Warren saw Griffin's men take over Confederate outposts but he also saw that any movement further up the Boydton Plank Road by his men would be covered by Confederate artillery and fortifications. Brigadier General Romeyn B. Ayres's division of the V Corps made a reconnaissance toward the White Oak Road a short distance west of Claiborne Road. The lead brigade under Colonel Frederick Winthrop crossed a swollen branch of Gravelly Run which was to feature in the following day's battle. Two other brigades did not cross but began to entrench. Winthrop's men saw the movement west of Pickett's brigades and captured a Confederate officer who provided information that was sent to Meade. Ayres saw only empty space to the northeast and failed to see heavy fortifications near the intersection of White Oak Road and Claiborne Road which angled sharply back to Hatcher's Run directly to his north. As dark approached, Ayres had a number of outposts prepared to cover his position, which was along and not beyond the Confederate line. Meanwhile, Humphrey's II Corps closed the gap between the V Corps and the XXIV Corps. The latter corps captured a large part of the Confederate picket line in their front. Humphrey's II Corp also moved as close to the Confederate line as possible without starting a general engagement and entrenched