Disease of the eyes incapacitated him for duty for a long time, and he was much disappointed that he was not permitted to take any part in the Mexican war. One of his most practical temperance addresses was that, while engaged off the coast of Africa in suppressing the slave trade, he persuaded the men under him on the Perry, of which he was the commander, to give up the use of liquor. Although exposed to one of the most pestilential climates in the world, he did not lose a man.

At the breaking out of the Civil War he was in command of the Brooklyn Navy Yard. He was overwhelmed with work for a time, and was glad when, early in the autumn of 1861, he was ordered to the West to help in the building of an inland navy on the Mississippi.

Captain Foote worked with the tremendous energy which he threw into every task, and succeeded in getting together seven boats, four of which were partly protected by armor. At the beginning of February, 1862, he started from Cairo to ascend the Tennessee, his objective point being Fort Henry, though the Confederates were deceived into thinking it was Columbus, on the Mississippi. He asked the Government for more men with which to man additional boats, but they were not furnished, and he went forward with such as he could get.

On the night preceding the attack on Fort Henry the little fleet anchored abreast of the army under General Grant, which was encamped on the bank. The night was cold and tempestuous, but the morning dawned keen and clear, and no time was lost in preparing the flotilla for the attack on the fort. He intimated to General Grant that he must not linger if he wished to cut off the retreat of the enemy. Grant assured him he would be on time to put his army in motion.

Fort Henry stood on a bend in the river, which it commanded for a long distance up and down stream. Foote placed his boats behind an island a mile below the fort, with a view of avoiding the long range rifles of the Confederates, which were liable to cripple the gunboats before they could get into close action. The wooden vessels halted upon coming in view of the fort, and the ironclads, as they were called, moved slowly up stream abreast of one another, firing their bow guns in answer to the shots of the rebels. The latter had had the time to practice to acquire the exact range, while the boats had yet to find it. They fired slowly and with such accuracy that the infantry stationed outside of the works hastily fled, though the gunners bravely remained at their posts.

Foote opened fire when not quite a mile from the fort. His instructions were to fire slowly and with care, the result of which was that guns were continually dismounted and the earth and sandbags sent flying in every direction. It was while the attack was being pressed in this vigorous fashion that a shell pierced the boiler of the Essex, commanded by Lieutenant Porter, and caused so many deaths, as has been related in a preceding chapter.

This appalling accident was a serious loss to Captain Foote, for Porter was doing inestimable service when thus driven out of action, but the daring commander pressed forward in the face of the murderous fire, encouraged by the visible results of his shots, which were playing frightful havoc against the defences of the fort. Tilghman, the Confederate commander, displayed great bravery, fighting until every one of his guns was dismounted. Then, finding himself powerless to offer further resistance, he hauled down his flag. Firing immediately ceased on the part of the Union flotilla, and Foote sent a boat ashore to take possession.

Despite General Grant's usual promptness, he did not arrive in time to intercept the flight of the garrison. As a consequence the prisoners surrendered, including General Tilghman and his staff, numbered less than a hundred. The others fled overland to Fort Donelson, only to be compelled to surrender shortly afterward to Grant in what proved to be the first great Union victory of the war.

The severity of this battle is shown by the fact that Foote's ship was struck 31 times, the Essex 15, and the Carondelet 6. The total number of killed, wounded and missing was 48. The success was so decisive that Foote was applauded throughout the North, sharing the well-earned honors with General Grant, whose successful career is known to every boy in the land.

Foote now steamed down the river to Cairo and began the ascent of the Cumberland, to assist General Grant, who was marching overland to the attack on Fort Donelson. Dauntless as was the courage of the naval leader, he knew his task was a hopeless one. He had not only lost the Essex, but Fort Donelson was greatly superior in strength to Fort Henry. The water assault, however, was deemed a military necessity, and he did not hesitate.