Let us explain. The Mississippi river is exceedingly tortuous in its course. Some miles above New Madrid in Missouri, it suddenly turns northwardly and makes a great bend. At or near the northerly curve of that bend lies the village of New Madrid, Missouri. There the Confederates had fortified themselves and there General Pope with his army in Missouri was threatening them. In the course of that vast bend lay Island Number 10, and here the Confederates had still more determinedly fortified themselves with a view of holding the great river. They had a strong force at Fort Pillow, on the Tennessee bank farther down the stream. They held Memphis on the Chickasaw bluffs 240 miles below Cairo. They had possession of Vicksburg and Port Hudson, but those positions had not yet been made strongholds by elaborate fortifications. They still held New Orleans and the defenses below that city, though they were destined soon to lose them. Thus they commanded the river and made of it a Confederate highway. It was the obvious policy of the Confederates to retain possession of that great river. It was the equally obvious policy of their adversaries to conquer control of it. When Beauregard wisely, and indeed under strategic compulsion, withdrew the forces from Columbus, Kentucky, he sent some of the troops constituting the garrison and most of the guns that bristled from the useless fortifications of that town to New Madrid and Island Number 10, where they were needed. Early in March General Pope moved down the Mississippi on its western side, and began operations for the reduction of New Madrid. When he had got his siege guns into position and opened a serious bombardment, the works there were quickly abandoned. Then began the assault upon Island Number 10, the one great northern stronghold of the Confederates in the Mississippi river, designed to hold that great waterway and forbid to the Federals its use as a thoroughfare into the heart of the South. The Federal army cut a canal across the peninsula formed by the great bend in the river. All the naval force that the Federals could command in those waters was brought to bear not only for the reduction of the forts there but still more for the beating off of the Confederate gunboats under Commodore Hollins. On the other hand Commodore Foote ran the canal with his Federal gunboats and established himself in a commanding position in reverse of the forts while Pope crossed the stream and assailed the enemy in front with all his land forces. The situation of the Confederates was a hopeless one and after an effort to escape they surrendered nearly 7,000 men and more than 150 guns, most of them of large caliber and formidable destructive force.