Early on the 27th, the Federals began to probe at various points along the Confederate trenches to distract the defenders. At 8 a.m. the Northern artillery opened a brief but heavy fire to prepare the way for the assaults. A few minutes later, the Federal infantry moved forward. McPherson’s troops, advancing on both sides of Burnt Hickory Road, swept over the Southern outposts and moved rapidly across the broken ground toward the main Confederate trenches. Although their lines were disordered, the blue-clad soldiers scrambled over rocks and fallen trees until they were finally halted by the heavy fire from their entrenched enemies. A few reached the Confederate line and were killed or captured while fighting in their opponents’ works. Southerners on Little Kennesaw added to the Northerners’ discomfort by rolling huge rocks down the mountainside at them. When the Union troops realized that their attack could not reach the Confederate lines, they broke off the engagement. Some were able to find protection in the advanced Confederate rifle-pits they had overrun and some managed to reach the positions from which they had begun the assault. A few were forced to seek shelter among the trees and large rocks on the slopes of the mountain where they remained until darkness offered a chance to return to their own lines. To the south, Thomas fared no better. Two columns were directed against the Southern position—one at Cheatham’s Hill, the other a short distance to the north. The Southerners expected no attack. Many of them were off duty and others were relaxing in the lines. The Federal artillery, however, alerted them to the danger and when Thomas’ infantry started forward, the Confederates were ready. As soon as the dense blue columns appeared in the cleared area between the lines, the Confederates opened what one Northerner called a “terrible” fire upon them. Men dropped rapidly but the columns continued up the long slope toward the Southern position. “The air,” one Federal remembered, “seemed filled with bullets, giving one the sensation experienced when moving swiftly against a heavy rain or sleet storm.” As the Union soldiers neared the crest of the ridge, they met the full fury of the defenders’ fire. To one Federal it seemed as if the Confederate trenches were “veritable volcanoes ... vomiting forth fire and smoke and raining leaden hail in the face of the Union boys.” Most of the attackers never reached the Confederate line. Those who did were too few to overpower the defenders and were quickly killed or captured. For a few brief seconds, two Northern battle flags waved on the breastworks, but the bearers were soon shot down and within a short time the attack had failed.