The Fort Donelson expedition was intended to break in two the rebel defensive line, which stretched the whole length of the State of Kentucky, from Columbus on the Mississippi, through Bowling Green, to Cumberland Gap. On this line, the rebels, under General A. S. Johnston, stood looking northward with threatening and defiant aspect. Grant saw that if he could seize Forts Henry and Donelson, which had been built to shut up the Tennessee and Cumberland rivers, the Union gunboats could range up and down through the heart of rebeldom, and the Union armies with them, and that thus the great rebel defensive line, cut through in the middle, would be broken as a chain is when a link is destroyed. He therefore asked leave of his immediate superior, Halleck, to take the forts; received it, concerted his plan of attack with Admiral Foote, and moved from Cairo, February 2d, 1862. The success of this expedition is well known. It should be recorded, however, even in this short summary, that to Grant is due the credit of possessing the military tact and promptness that showed him when to make the decisive attack, and impelled him to do it. This time was after that considerable success of the rebel sally from Fort Donelson on Saturday, Feb. 15th, under Pillow, which drove away so large a portion of the Union army from its place, and indeed left room enough for the whole rebel force to walk out of the fort and escape, if they had so chosen. This was done while Grant had gone to consult with Admiral Foote. When he came back, and saw how his troops had been driven, to any common mind the case would have seemed a pretty bad one; but Grant really does not appear to have seen any bad side to any case he had charge of during the war. At Belmont, when he was told that he was surrounded, he simply answered, "Well, then, we must cut our way out." His own description, afterwards given to Gen. Sherman, at Shiloh, of the impression now made on his mind by seeing how his troops had been pounded and driven, was as follows: "On riding upon the field, I saw that either side was ready to give way if the other showed a bold front. I took the opportunity, and ordered an advance along the whole line." In both cases, the thing was done.
At daylight on Sunday, the 16th, Gen. Buckner, (whose two superior officers, Floyd and Pillow, had run away,) sent a flag of truce asking for commissioners to consider terms of capitulation. Grant replied by the bearer, in a letter, two of whose phrases have become permanent contributions to the proverbial part of the English language:
"Yours of this date, proposing an armistice, and appointment of commissioners to settle terms of capitulation, is just received. No terms other than unconditional and immediate surrender can be accepted. I propose to move immediately upon your works."
Buckner's reply was in a very disgusted tone, and it may be excused to him under the circumstances, that he used some very curious explanatory phrases, and that he called names. But he came down, though it was from an extremely high horse, rejoining:
"The distribution of the forces under my command, incident to an unexpected change of commanders, and the overwhelming force under your command, compel me, notwithstanding the brilliant success of the confederate arms yesterday, to accept the ungenerous and unchivalrous terms which you propose."
The correctness of Grant's estimate of this whole movement was well proved by its instantaneous result—the evacuation of Columbus at one end of the rebel line, and of Bowling Green in the middle, and the falling back of the whole rebellion down to the southern boundary of Tennessee. The first great victory since Bull Run, the first important campaign in the West, it encouraged and elevated the spirits of the whole North, and in equal measure it alarmed and enfeebled the South. It had flung back the rebellion two hundred miles, along the whole length of Kentucky, across that State and Tennessee. With soldierly promptitude and energy, Grant followed up his victory by pushing the enemy, according to the Napoleonic maxim, that "victory is, to march ten leagues, beat the enemy, and pursue him ten leagues more."
Immediately after Donelson, Grant was made major general of volunteers by commission dated on the day of the fall of the fort, and was placed in command of the "Military District of West Tennessee," consisting of a long triangle with its northern point at Cairo, its base at the south, on the Mississippi State line, and its sides the Tennessee and Mississippi rivers. Thus promoted, Grant had already pushed southward. Foote's gunboats ascended the Cumberland, the troops kept abreast of them; Clarksville, with twenty days' subsistence for Grant's whole army, was occupied on Feb. 20th, four days after the capture of Donelson; and on the 23d, the advance of Buell's army, operating in conjunction with Grant's, entered Nashville.
When the rebel military line already mentioned, running lengthwise of the State of Kentucky, was broken up by Grant's getting through and behind it at Fort Donelson, the rebel leaders sought to hold another east and west line, coinciding nearly with the southern line of Tennessee, along the important Memphis and Charleston Railroad, and their commander in the West, Albert Sydney Johnston, set about concentrating his forces at Corinth, on that road. Halleck, by this time commanding the whole Department of the Mississippi, now prepared to attack Corinth. It was with this design that Grant's army was sent up the Tennessee, and encamped at Shiloh. But the rebels did not wait to be attacked. They advanced themselves, with the bold and judicious design of beating the army at Shiloh, and then of marching northward, regaining all the ground they had lost, and retaliating by an invasion of the States north of the Ohio.
This hardy attempt was well nigh successful. The night before the battle of Shiloh, Beauregard, as the rebel council of war separated, had prophesied: "To-morrow night we sleep in the enemy's camp." The sudden and vehement assault of the morning, maintained with tremendous and pertinacious fury all day long, had steadily crushed the Union army backward towards the Tennessee river, until towards sunset it had been pounded into a heterogeneous, irregular line of desperate fighters, and behind them a great mass of terrified and disheartened runaways, hiding under the river bank. What the heathen called Fortune, what Christians recognize as an overruling Providence, caused a conjuncture of circumstances by which, between night and morning, the relative number and spirits of the troops on both sides, and the result of the fight, were totally reversed. These circumstances were, the powerful resistance offered, at the end of the Sunday's disastrous fight, to the final charges of the rebels, by the artillery massed at the left end or key of the Union position, close to the river; by the further obstacle of a ravine stretching back from the river before the Union lines just at that point; by the powerful effect of the monstrous shells sent up this ravine and into the rebel lines from the two Union gunboats, Tyler and Lexington; and finally, by the coming upon the field of the advance of Buell's army. Beauregard's men slept in the Union camp, as he had said, but during the night Buell's troops and Gen. Lewis Wallace's division came upon the field. Monday morning, instead of last night's picture of 30,000 rebels, flushed with all day's victory, against at most 23,000 disorganized and all but overpowered Union troops, the daylight broke on a Union army of 50,000, being Grant's 23,000, somewhat refreshed and reorganized, and entirely inspirited; and 27,000 reinforcements, fresh and unbroken; while the rebel army, exhausted by its own efforts, had received no increase, had lost by stragglers, had rested ill in the cold rain, and had been all night long awakened every few minutes by the unwelcome reveillee of the great gunboat shells that were flung amongst them from the river. Weary and overweighted as they were, the rebels fought well, however, and it was not until four in the afternoon that they retreated, fighting still, and in good order, toward Corinth, whence they had set out.
When the rebels first attacked, Grant was at Savannah, seven miles down the river. Hastening back, he was on the field at the earliest possible moment, and did whatever could be done to withstand the tremendous force of the rebel advance. When Buell came upon the field toward night, the aspect of affairs so struck him that his first inquiry of Grant was, what preparations he had made for retreat.