 Tired but unfought and well-organized men from Buell's army and a division of Grant's army arrived in the evening of April 6 and helped turn the tide the next morning, when the Union commanders launched a counterattack along the entire line.Confederate forces were forced to retreat, ending their hopes of blocking the Union advance into northern Mississippi.Though victorious, the Union army had taken heavier casualties than the Confederates, and Grant was heavily criticized in the media for being taken by surprise.