Three gunboats under Lieutenant-Commander S. L. Phelps went up the Tennessee as far as Florence, Alabama, while others proceeded to the mouth of the Cumberland and ascended it to aid the land forces.
Commander Phelps on his way up the river seized two steamers, caused six others loaded with supplies to be destroyed, took at Cerro Gordo a half-finished gunboat, and made other important captures of military supplies. He discovered considerable Union sentiment among the inhabitants, some of them voluntarily enlisting to fight the Confederacy.(16)
Grant was assigned to the District of West Tennessee February 14, 1862.(17)
General Grant had, when he commenced the attack of Fort Donelson, about 15,000 men, in three divisions, commanded, respectively, by Generals C. F. Smith, John A. McClernand, and Lew Wallace. The total force of the enemy was not less than 20,000, under the command of General J. B. Floyd.(18) The investment of the fort commenced on the 12th, but it was not complete until the evening of the 13th, on the arrival of the gunboats and the troops sent by water. Flag Officer Foote opened fire on the enemy's works at 3 P.M. on the 14th, from four gunboats, which continued for an hour and a half with a brilliant prospect of complete success, when each of the two leading boats received disabling shots and were carried back by the current. The other two were soon partially disabled and hence withdrawn from the fight. Grant then concluded to closely invest the fort, partially fortify his lines, and allow time for Commodore Foote to retire, repair his gunboats, and return. But the enemy did not permit this to be done. He drew out from his left the principal part of his effective troops under Generals Gideon J. Pillow, B. R. Johnson, and S. B. Buckner during the night of the 14th, and at early dawn of the 15th assailed, with the purpose of raising the siege or of escaping, the extreme right of Grant's army. A battle of several hours' duration ensued, and for the most part the Confederates gained ground, driving back the Union right upon the centre. Grant was absent in consultation with Commodore Foote (19) when the attack began. Foote was then contemplating a return to Cairo to repair damages, and was likewise wounded.(19) Grant on returning to the battle-ground ordered a counter-attack on the enemy's right by Smith's division, which met with such success as to gain, at the close of the day, possession of parts of the Confederate intrenchments. After Smith's charge had commenced, McClernand and Wallace were ordered to assume the offensive on the enemy's left flank, which resulted in driving the Confederates back to the works from whence they had emerged in the morning. Preparation was then made for an assault all along the line early next morning.
Consternation and demoralization prevailed in the Confederate camps during the night, especially at headquarters.
A council of war was held at midnight of the 15th between Floyd, Pillow, and Buckner, at which the number of Grant's army was greatly magnified, and it was decided that it was impracticable to attempt to cut through the investment. Floyd pretended to believe that his capture was of the first importance to the Union cause, and, although the senior in command, he announced a determination "not to survive a surrender there." Pillow, the next in command, also assumed the same importance and individual right for himself; hence Floyd, through Pillow, turned over the command, at the end of the council, to Buckner, with the understanding that the latter would, at the earliest hour possible, open negotiations for the surrender of the forces.(20) Floyd and Pillow, with the aid of two small steamboats, which arrived from Nashville in the night, succeeded in ferrying across the river and in getting away with about 1000 officers and men, principally belonging to Floyd's old brigade. Some cavalry and small detachments and individual officers with Colonel Forrest escaped in the night by the river road, which was only passable, on account of back-water, for mounted men.(21)
The action of both Floyd and Pillow in not sharing the fate of their commands, and the conduct of Floyd especially in carrying off the troops of his old brigade in preference to others, were strongly condemned by President Davis and his Secretary of War. Both Generals were, by Davis's orders, relieved,(21) and neither, thereafter, held any command of importance. The sun of their military glory set at Donelson. Floyd had been unfaithful to his trust as Buchanan's Secretary of War, and early, as we have seen, deserted his post to join the Rebellion. Pillow as a general officer had won a name in fighting under Taylor and Scott and the flag of the Republic in Mexico.
At an early hour on the 16th Buckner sent a note to Grant proposing "the appointment of commissioners to agree upon the terms of capitulation of the forces and post" under his command, and suggesting an armistice until 12 o'clock of that day. To this note Grant responded thus:
"Yours of this date, proposing armistice and appointment of commissioners to settle terms of capitulation, is just received. No terms except unconditional and immediate surrender can be accepted. I propose to move immediately on your works."
General Buckner denominated Grant's terms as "ungenerous and unchivalrous," but accepted them, forthwith capitulating with about 15,000 officers and men, about 40 pieces of artillery, and a large amount of stores, horses, mules, and other public property.