As a general, James Longtreet's strong point was being able to organize powerful assaults against enemy positions. But on this date, that skill somehow deserted him. In possibly the worst planned and executed battle of his career, Lonstreet sent about 3,000 Confederate infantry against Fort Sanders, a key stronghold for the area of Knoxville. But although the fort had a mere 440 defenders, it had been well prepared. A large ditch, twelve feet (3.5 m) wide and from four to ten feet (1–3 m) deep was just outside the fort's outer walls. Longstreet had seen this through a telescope, though he had misjudged its depth. What he had not seen was that telegraph wires had been strung out over the approaches to the fort, slowing down the Rebel charge (one of the first documented uses of defensive wire):
[font="Times New Roman"]The assault was made by the brigades of Generals Wofford, Humphreys, and Bryan at the appointed time and in admirable style. The orders were, that not a musket should be discharged except by the sharp-shooters, who should be vigilant and pick off every head that might appear above the parapets until the fort was carried. The troops marched steadily and formed regularly along the outside of the works around the ditch. I rode after them with the brigades under General B. R. Johnson until within five hundred yards of the fort, whence we could see our advance through the gray of the morning. A few men were coming back wounded. Major Goggin, of General McLaws’s staff, who had been at the fort, rode back, met me, and reported that it would be useless for us to go on; that the enemy had so surrounded the fort with net-work of wire that it was impossible for the men to get in without axes, and that there was not an axe in the command. Without a second thought I ordered the recall, and ordered General Johnson to march his brigades back to their camps.
[center]--James Longstreet, From Manassas to Appomattox: Memoirs of The Civil War in America[/center][/font]
The recall apparently did not reach all of the Confederate units in time. A number of Rebels advanced into the fort's ditch, but they had not been equipped with scaling ladders, and the walls halted them while musket balls and grapeshot swept through their ranks. A very few manged to climb the walls, only to be promptly shot down or captured.
After twenty minutes of slaughter, the Confederates fell back. They had lost 129 killed, 458 wounded, and 226 captured, against Union losses of only 8 killed and 5 wounded. The chance of taking Knoxville by storm was ended, and the chance of starving the Federals out was already gone. (Cattle were being herded into the town.)
But neither Ulysses S. Grant nor the Lincoln administration in Washington knew that. Returning to Chattanooga, Grant found to his consternation that the troops for the relief of Knoxville had not yet marched. He immediately decided to send Sherman and his force, even though those men had been "stripped for the fight", issued rations for only two days and not provided with tents for shelter from the cold nights.





