United States Revenue Cutter Service
During the Mexican–American War, President James K. Polk ordered the Secretary of the Treasury to have cutters in the Gulf of Mexico report to the United States Army (instead of the Navy). By the end of the war, eight cutters had served with the Army. This was out of a total fleet of only 14 cutters. They had capabilities the Navy (or Army) did not have. This was boats that could operate in shallow water and be used for amphibious landings. The Revenue cutters served on blockade duty, ferried men and supplies and supported Army and Navy operations.