On March 31, 1865, between 4 and 5:30 p.m., Confederate forces launched frontal assaults against the now constricted Union defensive lines at Dinwiddie Court House. As darkness fell, Pickett halted the attacks even though many Confederate soldiers felt victory was near. Confederate units reorganized around large fires in a cold nighttime bivouac on the battlefield, with celebratory music from their bands, while Union troops were ordered to sleep on their arms without warming fires. During the night, Pickett learned that the Union V Corps was moving on his left and rear, threatening to isolate his force from the White Oak Road entrenchments and additional support. He then withdrew from the field in the middle of the night, retraced his steps to Five Forks, and dug in against an expected counterattack by combined Union infantry and cavalry. Late that night Sheridan told Grant that Pickett's force was in greater danger than his own and that drawing Confederate infantry out of its fortifications created an opportunity to attack. Before dawn on April 1, 1865, Sheridan advanced cautiously and found that the Confederates had withdrawn, then pushed toward Five Forks while skirmishing with the Confederate rear guard as both armies moved toward the decisive Battle of Five Forks, called the Waterloo of the Confederacy.