At dawn on May 8, Wesley Merritt's cavalrymen attacked Fitzhugh Lee's barricades on the Brock Road again, but were repulsed. Meade ordered Warren's V Corps to break through with infantry and the division of Brig. Gen. John C. Robinson led the way in overwhelming the cavalry obstacle. Fitzhugh Lee's horse artillery made a gallant stand around the Alsop farm and delayed the Union advance while the cavalrymen staked out a defensive line on a low ridge just south of the Spindle farm clearing, which they dubbed "Laurel Hill." Lee sent for help to Anderson's infantry, which by now had reached the Block House Bridge on the Po River and were eating breakfast. Anderson immediately dispatched two infantry brigades and an artillery battalion, which arrived at Laurel Hill just as Warren's men pulled up within 100 yards to the north.