Placing Rosecrans in command of Corinth, Grant established his headquarters at Jackson, Tennessee, where he could better control the affairs of his district. On the 2d of October, the rebels united all their forces in this vicinity, and attacked Corinth, making a good fight, and gaining decided advantages; but in the end they were defeated, and the place saved. The force of the enemy was double that of Rosecrans, who behaved with distinguished gallantry. The defensive works which had been erected under Grant's direction proved to be of immense service, and showed that the general who had been severely criticised for neglecting them before knew when and where to use them--knew when they were necessary, and where they were a hinderance. Grant had marked out this campaign himself; and though the battle of Corinth had been fought, and the rebels defeated, there was to be a sequel to the affair. Reading the intention of the foe to attack his strong place, he sent McPherson with a brigade to the assistance of Rosecrans; but he arrived only in season to witness the conclusion of the fight, being obliged to make a detour in order to effect his junction. Grant, with his usual confidence in the success of his combinations, had also sent Generals Ord and Hurlbut, each with a brigade, to punish still further the audacious foe in his retreat. He had notified Rosecrans of his plan, and directed him to follow up the retreating enemy vigorously, as well to insure his complete discomfiture, as to save either Ord or Hurlbut from being separately overwhelmed by a superior force. But these two commanders had joined their brigades, and Ord posted the whole so as to cover a bridge on the Hatchie River. Van Dorn's column pushed on, and its advance crossed the bridge, when Ord's force attacked vigorously, and immediately routed it. A battery of artillery and several hundred men were captured, and the advance scattered, many of the rebels being drowned in their attempt to cross the river. Ord held the bridge, but had not strength enough to attack the entire rebel army, which he compelled to retrace its steps, and seek another bridge six miles distant. Unfortunately, Ord was wounded in the conflict, and Hurlbut, who succeeded to the command, did not deem it prudent even to harass the fleeing rebels in the rear or on the flanks.