Rosecrans had planned to attack the Confederate right under Breckinridge, while on the other hand Bragg had planned to attack the Federal left under McCook, and to seize the Nashville turnpike and thereby cut off Rosecrans' retreat. Neither, of course, knew of the other's plan. At the break of day, on December 31st, the Confederate left moved forward in a magnificent battle-line, about a mile in length and two columns deep. At the same time the Confederate artillery opened with their cannon. The Federals were astonished at so fierce and sudden a charge and were ill prepared. Before McCook could arrange them several batteries were overpowered and several heavy guns fell into the hands of the Confederates. The Union troops fell back in confusion and seemed to have no power to check the impetuous charge of the onrushing foe. Only one division, under General Philip H. Sheridan, held its ground. Sill's brigade of Sheridan's division drove the Confederates in front of its back to their entrenchments, but in this charge the brave commander lost his life. While the battle raged with tremendous fury on the Union right, Rosecrans was three miles away, throwing his left across the river. Hearing the terrific roar of the cannon and rattle of the musketry, he hastened to attack Breckinridge, hoping to draw a portion of the Confederate force away from the attack on his right. Ere long the sound of battle was coming nearer, and he rightly divined that his right wing was being rapidly driven upon his center by the dashing soldiers of the South. He ordered McCook to dispute every inch of the ground; but McCook's command was torn to pieces except the division of Sheridan, which stood firm against the overwhelming numbers, which stand attracted the attention of the country and brought military fame to Sheridan. He checked the onrushing foe at the point of the bayonet, and re-formed his lines under a heavy fire. Rosecrans ordered up the reserves to the support of the Union center and right. Here for two hours longer the battle raged with unabated fury. Three times the Confederate left and center were thrown against the Union lines, but failed to break them. At length it was discovered that the ammunition was exhausted in Sheridan's division and he withdrew in good order to a plain near the Nashville road. The Confederates' advance was checked by the division of Thomas. It was now in the afternoon, and still the battle raged in the woods and on the hills about Murfreesboro. The Federal right and center had been forced back to Stone's River, while Bragg's right was on the same stream close to the Federal line. In the meantime Rosecrans had massed his artillery on a hill overlooking the field. He had also re-formed his broken lines, and had called 12,000 fresh troops from his left into action. The battle re-opened with utmost fury, and the ranks of both armies were torn with grape and canister and bursting shells.