Some of his lieutenants did their work incompetently, thus in a degree baffling his purpose, but in the main those whom he had wisely selected for command did that which he required of them in masterly fashion. Sigel, who was to advance up the Valley of Virginia, and break the communications between Tennessee and the Confederate capital, failed utterly. In profound disgust, General Grant received from Halleck a dispatch saying, "Sigel is in full retreat on Strasbourg. He will do nothing but run; never did anything else." Banks also failed to place his army of 40,000 men at New Orleans in time to help in the grand strategy which Grant had inaugurated. Butler got himself "bottled up," as General Grant phrased it, on the south side of the James river, so that while he held a strong defensive position there, he was unable to employ his troops aggressively with effect. But the rest of Grant's subordinates--and especially Sherman--carried out their orders with brilliant capacity and tremendous effect. While Grant was thus preparing for his grand campaign, the Confederates were not idle. With forces greatly inferior in number and equipment, and with an exhausted country behind him, Lee stood upon the defensive, waiting to see what his adversary might undertake, and what opportunities might open themselves to him for offensive defense. In the meanwhile that most active and tireless of campaigners, General N. B. Forrest, went upon a raid in West Tennessee and Kentucky which, for a time, seriously threatened an invasion of the North and a disturbance of General Grant's plans. Sweeping northward like a hurricane, Forrest captured the Federal garrison of 500 men at Union City in Tennessee, wrecked railroads in every direction, and pushed his column daringly to Paducah, Kentucky, on the banks of the Ohio, fifty miles above Cairo. Sherman sent all his cavalry and other available troops to check this movement, and if possible to make an end of Forrest by capturing him and his force. But Forrest was too quick for him. Rapidly falling back, he assailed the Federal fort on the Mississippi river, known as Fort Pillow. That fortress was held by negro troops, and the Southerners had never yet consented to regard the employment of such troops as legitimate in this war. Here it is necessary to explain. The enlistment of negroes in military service was no new thing in American war. During the Revolution, and even before it, the statutes of South Carolina and of some of the other colonies specifically provided for such enlistments, and in South Carolina, at least, the law made it an offense for the master of any slave to refuse his service to the country as a soldier. Again during the war of 1812-1815, Andrew Jackson made free use of vigorous young negroes, enlisting them as soldiers wherever he could find them, and appealing to their patriotism to support with manly determination the independence of the only country they could call their own.