When Hood took over command of the Army of Tennessee, Sherman was only five miles from Atlanta. Hood was the most aggressive general the confederacy had. He intended to defend Atlanta. On July 20 Hood's army attacked Union general George Henry Thomas's Army of the Cumberland. John Schofield's Army of the Ohio and James B. McPherson's Army of the Tennessee were both moving around the Confederate right and could not help Thomas. But Thomas's army stood fast. The Confederates withdrew after losing 2,500 killed or wounded. Hood next attacked on 22 July. He threw his entire force against McPherson's Army of the Tennessee on Sherman's left flank. The battle started about noon and lasted until midnight.