The following night was chill and rainy; and the Union forces, bivouacking on shore, grumbled loudly over their discomforts. The morning dawned dark; but soon the sun came out, and the preparations for battle were begun. The troops were first despatched on their cross-country march; and, as they departed, Commodore Foote remarked coolly, that his gunboats would have reduced the fort before the land forces came within five miles of it. This proved to be the fact.

The gunboats formed in line of battle, and advanced up the river. The four iron-clads led, steaming abreast. About a mile in the rear, came the three wooden vessels. The fort was soon in range; but both parties seemed anxious for a determined conflict, and no shot was fired on either side as the gunboats came sullenly on. How different must have been the feelings of the two combatants! Tilghman, with his handful of men, hardly able to work eight of the eleven guns mounted in his fort, and knowing that his defeat was a mere question of time; Foote, with his iron-clads and supporting gunboats, his seventy-two guns, and his knowledge that six thousand men were marching upon the rear of the Confederate works. On the one side, all was absolute certainty of defeat; on the other, calm confidence of victory.

When the flotilla was within a third of a mile of the fort, the fire began. The gunners on the ships could see the muzzles of the Confederate guns, the piles of shells and cannon-balls, and the men at their work. The firing on both sides was deliberate and deadly. The Confederates were new to the work, but they proved themselves good marksmen. The first shot was fired from the shore, and, missing the "Essex" by but a few feet, plumped into the water, so near the next ship in line as to throw water over her decks. Within five minutes, the "Essex" and the "Cincinnati" were both hit. The armor of the gunboats proved no match for the shots of the Confederates, and in many cases it was penetrated. In some instances, shells, entering through the portholes, did deadly damage.

On the shore, the shells from the gunboats were doing terrible work. Banks of solid earth, eight feet thick, were blown away by the terrible explosions. One, bursting in front of a ten-inch columbiad, filled that powerful gun with mud almost to the muzzle, disabling it for the remainder of the fight. A shot from the "Essex" struck the muzzle of a great gun, ripped off a splinter of iron three feet long, and crushed a gunner to pulp. The gun was just about to be fired, and burst, killing or wounding every man of the crew. At the same moment a shell crashed through the side of the "Essex," killing men right and left: took off the head of a sailor standing by Capt. Porter, wounded the captain, and plunged into the boiler. In an instant the ship was filled with scalding steam. The men in the pilot-house were suffocated. Twenty men and officers were killed or scalded. The ship was disabled, and drifted out of the fight. While withdrawing, she received two more shots, making twenty in all that had fallen to her share in this hot engagement. But by this time the fort was very thoroughly knocked to pieces. The big twenty-four pounder was dismounted, and five of its crew killed. Gun after gun was keeled over, and man after man carried bleeding to the bomb-proofs, until Gen. Tilghman himself dropped coat and sword, and pulled away at a gun by the side of his soldiers. Receiving ten shots while they could only fire one, this little band held out for two long hours; and only when the crew of the last remaining piece threw themselves exhausted on the ground, did the flag come fluttering down. Gen. Tilghman went to the fleet and surrendered the fort to Commodore Foote, and Grant's army came up more than an hour after the battle was over. To the navy belongs the honor of taking Fort Henry, while to Gen. Tilghman and his plucky soldiers belongs the honor of making one of the most desperate fights under the most unfavorable circumstances recorded in the history of the civil war.

The fall of Fort Henry opened the way for the Union advance to Fort Donelson, and marked the first step of the United States Government toward regaining control of the Mississippi. It broke the northern battle-line of the Confederacy, and never again was that line re-established.

With Fort Henry fallen, and Gen. Tilghman and his little garrison prisoners on the Union gunboats, Grant's soldier-boys and Foote's blue-jackets began active preparations for continuing the conquest of Tennessee by the capture of Fort Donelson. No time was lost. The very night that the stars and stripes were first hoisted over the bastion of Fort Henry saw three of Foote's gunboats steaming up the river on a reconnoitring expedition. Before them the Confederates fled in every direction. After several hours' advance, they came to a heavy railroad-bridge spanning the river, and effectually preventing further progress. Beyond the bridge were several Confederate steamers, black with men, and heavily laden with valuable military stores. With all steam on, they were dashing up stream, and rapidly leaving the gunboats behind. Enraged at seeing such valuable prizes slipping through their hands, the Union gunners sent shell after shell shrieking after the flying boats, but to no avail. A party was hastily landed for the purpose of swinging the draw of the bridge, but found the machinery broken, and the ways on which the bridge swung twisted and bent out of shape. An hour's hard work with axes and crowbars, and the draw was swung far enough to let pass the "Conestoga" and the "Lexington." They dashed forward like greyhounds slipped from the leash; and, after several hours' hard steaming, a smoke over the tree-tops told that the Confederate fugitives were not far ahead. Soon a bend in the river was passed; and there, within easy range, were two of the flying steamers. A commotion was visible on board, and boat after boat was seen to put off, and make for the shore; on reaching which the crews immediately plunged into the woods, and were out of sight before the gunboats could get within range. Soon light blue smoke curling from the windows of the steamers told that they had been fired; and as the last boats left each vessel, she ceased her onward course, and drifted, abandoned and helpless, down the stream. When within about a thousand yards of the two gunboats, the deserted steamers blew up with such force, that, even at that great distance, the glass was shattered in the "Conestoga," and her woodwork seriously damaged.

The two gunboats leisurely continued their excursion into the heart of the enemy's country. Little or no danger was to be feared. At that time, the Confederates had not learned to plant torpedoes in their rivers, to blow the enemy's vessels into fragments. There was no artillery stationed in that section to check their progress, and the only resistance found was an occasional rifle-shot from some concealed sharp-shooter in the bushes on the shore. On the 7th of February the gunboats reached Cerro Gordo, Tenn.; and here they made a valuable capture. The Confederates had been at work for weeks converting the steamer "Eastport" into an iron-clad ram; and, as the Union vessels came up, they found her almost completed, and absolutely without defence. Besides the new vessel, there was in the shipyard a large quantity of lumber and ship-timber, which was of the greatest value to the builders of the river navy. The two gunboats promptly captured all this property; and waiting until the "Tyler," which had been detained at the drawbridge, came up, they left her in charge, and continued their raid into the enemy's country. Little incident occurred until they reached the head of navigation of the river, where they found all the Confederate vessels which had been flying before them for two days. These were burned, and the two gunboats started back down the river, stopping for the "Eastport" on the way. The captured vessel was afterwards completed, and served the cause of the Union for two years, when she was blown up on the Red River.

When the raiding expedition reached Cairo, the officers found Foote getting his squadron together for the attack on Fort Donelson. This fortification was one strongly relied upon by the Confederates for the maintenance of their northern line of battle. It was on the bank of the Cumberland River, nearly opposite the site of Fort Henry on the Tennessee. A garrison of at least fifteen thousand men manned the works, and were commanded by no less than three generals; and the fact that there were three generals in command had much to do with the fall of the fort. Its strength was rather on its river-front. Here the river winds about between abrupt hillsides, and on the front of one of these hills stood Fort Donelson. The water-batteries were made up of heavy guns, so mounted as to command the river for miles. On the landward side were heavy earthworks, abatis, and sharp pointed chevaux-de-frise.

Against this fortification marched Grant with an army of eighteen thousand men, and Foote with his flotilla of gunboats. The Sunday before the start, Foote, who was a descendant of the old Puritans, and ever as ready to pray as to fight, attended church in a little meeting-house at Cairo. The clergyman did not appear on time; and the congregation waited, until many, growing weary, were leaving the church. Then the bluff old sailor rose in his pew, and, marching to the pulpit, delivered a stirring sermon, offering thanks for the victories of the Union arms, and imploring divine aid in the coming struggles. The next day he was on his way to hurl shot and shell at the men in the trenches of Fort Donelson.

While the capture of Fort Henry was a feather in the caps of the sailor-boys of the North, Fort Donelson must be credited to the valor of the soldiers. Against the heavy wall of the water-batteries, the guns of Foote's little flotilla pounded away in vain, while the heavy shells from the Confederate cannon did dreadful work on the thinly armored gunboats. It was on the 13th of April that the assault was opened by the "Carondelet." This vessel had reached the scene of action before the rest of the flotilla, and by order of the army commander tested the strength of the fort by a day's cannonade. She stationed herself about a mile from the batteries, at a spot where she would be somewhat protected by a jutting point, and began a deliberate cannonade with her bow-guns. One hundred and thirty shots went whizzing from her batteries against the front of the Confederate batteries, without doing any serious damage. Then came an iron ball weighing one hundred and twenty pounds, fired from a heavy gun, which burst through one of her portholes, and scattered men bleeding and mangled in every direction over the gun-deck. She withdrew a short distance for repairs, but soon returned, and continued the fire the remainder of the day. When evening fell, she had sent one hundred and eighty shells at the fort, with the result of killing one man. This was not promising.