The next active service performed by the gunboats was at the battle of Belmont, directly opposite the Confederate batteries at Columbus. The Union troops, landing in force, had driven the Confederates from their camp, and were engaged in securing the spoils, when the gunners at Columbus, seeing that the camp was in the hands of the enemy, turned their heavy guns on it, and soon drove out the Yankees. The Confederates had rallied in the woods, and now came pouring out, in the hope of cutting off the Union retreat to the boats. On all sides the dark gray columns could be seen marching out of the woods, and pouring down upon the retreating army of the North. Batteries were wheeling into position, and staff-officers in travelling carriages were dashing to and fro carrying orders. It seemed a black day for the three or four thousand Unionists who were making for their transports with all possible speed. But now was the time for the gunboats to take a hand in the fight. Three of them dropped into position, and began a deadly fire upon the Confederate line. The huge shells ploughed their way through whole platoons of men. Bursting, they would mow down soldiers like saplings before a cyclone. One shell exploded directly beneath an officer's carriage, and threw horses, carriage, and men high in the air. The Confederates hastened to get their field-batteries into position, and replied to the deadly fire from the ships, but to no avail. Their light artillery was of no effect upon the plated sides of the gunboats, and they saw their cannon dismounted or shattered by the solid shot from the big guns of the iron-clads. They fought bravely, but the conflict was unequal. It was sheer madness for any body of men, with muskets and light artillery, to stand against the fire of the gunboats. The gunboats saved the day. The retreat of the Union army was unchecked; and, covered by the war-vessels, the transports returned safely to Cairo.