The government was dissatisfied with the sluggishness of Buell and replaced him with General William S. Rosecrans. He posted a part of his army at Nashville and the remainder along the line of the Cumberland River. Advancing against Bragg, he faced him in front of Murfreesboro', some forty miles from Nashville. On the 30th of December brisk firing took place between the armies, and when they encamped for the night their fires were in plain sight of each other. BATTLE OF MURFREESBORO' OR STONE RIVER. The opposing forces were on both sides of Stone River (this battle is generally referred to in the South by that name), a short distance to the northwest of Murfreesboro'. By a curious coincidence, each of the respective commanders formed the same plan of attack, it being to mass his forces on the left and crush his enemy's right wing. A terrific engagement lasted all day, and night closed without any decisive advantage to either side, though the Confederates had succeeded in driving back the Union right upon the left and occupying a considerable portion of the field formerly held by the Federals. The exhaustion of the armies prevented anything more than skirmishing on New Year's day, 1863, but on the afternoon of January 2d the furious battle was renewed. Rosecrans ordered an advance of the whole line, and the Confederate right wing was broken and the flank so endangered that Bragg was compelled to withdraw his entire army. The only way for him to retain Tennessee was to abandon Murfreesboro'. Accordingly, he retreated to a point beyond Duck River, about fifty miles south of Murfreesboro', which was occupied by the Federals, January 5, 1863. Other important events took place in the West. General Sterling Price wintered in Springfield, Missouri, in the southern part of the State, and gained a good many recruits and a large amount of needed supplies. He was attacked by Sigel and Curtis on the 12th of February, and continued his retreat to the Boston Mountains, where he was reinforced by McCulloch, Van Dorn, and Albert Pike, and felt himself strong enough to turn about and attack Curtis, who was in the neighborhood of Pea Ridge. BATTLE OF PEA RIDGE. The Union right was commanded by General Sigel, the left by General Carr, and the centre by General Jefferson C. Davis. Sigel was surprised and came very near being cut off, but he was master of the art of retreating rather than of advancing, and he extricated his Germans with astonishing skill and joined the main army. General Curtis changed his front, and in the attack his right wing was driven back, obliging him that night to take a new position a mile to the rear. The fighting next day was at first in favor of the Confederates, and for a time the Union army was in a critical position; but with great bravery and skill the enemy's left was turned, the centre broken, and their forces driven in disorder from the field.