On land and water, in the North, the South, and in foreign seas, the United States Marines expanded their service in the third year of the Civil War. In the South, near the end of the third year, Marines joined in the ill-fated attempts of September 1863 to recapture Fort Sumter, and in May 1864 the Red River expedition on the other side of the Confederacy. But the Corps` work in the ongoing coastal war yielded success, as that duty continued.