General Joseph E. Johnston’s army had fallen fell back from Cassville to the Dallas area and entrenched. Union Gen. William T. Sherman’s army tested the Rebel line, then dug in themselves. On May 28, Lt. Gen. William J. Hardee’s corps probed the Union defensive line, held by Maj. Gen. John A. Logan’s corps. Light skirmishing devolved into heavy fighting, with each side pouring more men into the fight. The Rebels were eventually repulsed, though both sides suffered high casualties. Sherman, looking to outmaneuver Johnston, left his Dallas lines on June 5, and moved his army towards the rail at Allatoona Pass. Johnston followed shortly, paralleling Sherman’s movements and hoping to block his advance on Atlanta.