In addition to its heavy work of maintaining the Atlantic blockade, the navy of the United States contributed signally toward the suppression of the rebellion by three brilliant victories which it gained during the first half of the year 1862. After careful preparation during several months, a joint expedition under the command of General Ambrose E. Burnside and Flag-Officer Goldsborough, consisting of more than twelve thousand men and twenty ships of war, accompanied by numerous transports, sailed from Fort Monroe on January 11, with the object of occupying the interior waters of the North Carolina coast. Before the larger vessels could effect their entrance through Hatteras Inlet, captured in the previous August, a furious storm set in, which delayed the expedition nearly a month. By February 7, however, that and other serious difficulties were overcome, and on the following day the expedition captured Roanoke Island, and thus completely opened the whole interior water-system of Albemarle and Pamlico sounds to the easy approach of the Union fleet and forces. From Roanoke Island as a base, minor expeditions within a short period effected the destruction of the not very formidable fleet which the enemy had been able to organize, and the reduction of Fort Macon and the rebel defenses of Elizabeth City, New Berne, and other smaller places. An eventual advance upon Goldsboro' formed part of the original plan; but, before it could be executed, circumstances intervened effectually to thwart that object. While the gradual occupation of the North Carolina coast was going on, two other expeditions of a similar nature were making steady progress. One of them, under the direction of General Quincy A. Gillmore, carried on a remarkable siege operation against Fort Pulaski, standing on an isolated sea marsh at the mouth of the Savannah River. Here not only the difficulties of approach, but the apparently insurmountable obstacle of making the soft, unctuous mud sustain heavy batteries, was overcome, and the fort compelled to surrender on April 11, after an effective bombardment. The second was an expedition of nineteen ships, which, within a few days during the month of March, without serious resistance, occupied the whole remaining Atlantic coast southward as far as St. Augustine.