which branch of the service was once known as the revenue marine
United States Revenue Cutter Service The United States Revenue Cutter Service was established by an act of Congress (1 Stat. 175) on 4 August 1790 as the Revenue-Marine upon the recommendation of Secretary of the Treasury Alexander Hamilton to serve as an armed customs enforcement service. As time passed, the service gradually gained missions either voluntarily or by legislation, including those of a military nature. It was generally referred to as the Revenue-Marine until July 1894, when it was officially renamed the Revenue Cutter Service.
United States Coast Guard The United States Coast Guard (USCG) is a branch of the United States Armed Forces[14] and one of the country's seven uniformed services. The Coast Guard is a maritime, military, multi-mission service unique among the U.S. military branches for having a maritime law enforcement mission (with jurisdiction in both domestic and international waters) and a federal regulatory agency mission as part of its mission set. It operates under the U.S. Department of Homeland Security during peacetime, and can be transferred to the U.S. Department of the Navy by the U.S. President at any time, or by the U.S. Congress during times of war. This has happened twice, in 1917, during World War I, and in 1941, during World War II.[8][10]