Meade asked Grant for clarification because Grant previously had ordered a 4:00 a.m. attack all along the line. Grant said both Humphreys and Parke should feel for a chance to push on that night, that Humphreys should send skirmishers forward and attack if the Confederates were leaving their positions. If the Confederates held their line, Grant said that Humphreys should send Miles's division down White Oak Road to reinforce Sheridan. Miles's and Brigadier General (Brevet Major General) Gershom Mott's divisions from Humphreys corps attacked at once but could not do more than drive in the Confederate pickets as Confederate artillery opened up on them. Miles division was sent to Sheridan just before midnight but Mott's and Brigadier General William Hays's divisions continued probing the Confederate line.