page_title: United States Coast Guard
section_title: History
hierarchical_section_title: United States Coast Guard / History
caption_attribution_description: The U.S. Coast Guard cutter USCGC Duane (WHEC-33) shelling targets in Vietnam. Her main battery fired in support of forces ashore in Vietnam 17 different times, firing a total of 1,778 rounds of ammunition. Naval Gunfire Support (NGFS) was one of the primary missions assigned to the cutters of Coast Guard Squadron Three.
context_page_description: The United States Coast Guard is the coastal defense, search and rescue, and maritime law enforcement branch of the United States Armed Forces and one of the country's eight 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 duties. 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. Congressional authority transfers happened twice: in 1917, during World War I, and in 1941, during World War II.
  Created by the U.S. Congress on 4 August 1790 at the request of Alexander Hamilton as the Revenue-Marine, it is the oldest continuous seagoing service of the United States. As Secretary of the Treasury, Hamilton headed the Revenue-Marine, whose original purpose was collecting customs duties at U.S. seaports. By the 1860s, the service was known as the U.S.
context_section_description: The Coast Guard traced its roots to the small fleet of vessels maintained by the United States Department of the Treasury beginning in the 1790s to enforce tariffs (an important source of revenue for the new nation). Secretary of the Treasury Alexander Hamilton lobbied Congress to fund the construction of ten cutters, which it did on 4 August 1790 (now celebrated as the Coast Guard's official birthday). Until the re-establishment of the Navy in 1798, these "revenue cutters" were the only naval force of the early United States. As such, the cutters and their crews frequently took on additional duties, including combating piracy, rescuing mariners in distress, ferrying government officials, and even carrying mail. Initially not an organized federal agency at all, merely a "system of cutters," each ship  operated under the direction of the customs officials in the port to which it was assigned. Several names, including "Revenue-Marine," were used as the service gradually becoming more organized. Eventually it was officially organized as the United States Revenue Cutter Service. In addition to its regular law enforcement and customs duties, revenue cutters served in combat alongside the Navy in various armed conflicts including the American Civil War.
  The modern Coast Guard was created in 1915, when the Revenue Cutter Service merged with the U.S. Life-Saving Service. The Lighthouse Service and the Bureau of Marine Inspection and Navigation were absorbed by the Coast Guard 1939 and 1942 respectively. 
  In 1967, the Coast Guard moved from the U.S. Department of the Treasury to the newly formed U.S. Department of Transportation, an arrangement that lasted until it was placed under the U.S. Department of Homeland Security in 2003 as part of legislation designed to more efficiently protect American interests following the terrorist attacks of 11 September 2001.
  In times of war, the Coast Guard or individual components of it can operate as a service of the Department of the Navy. This arrangement has a broad historical basis, as the Coast Guard has been involved in wars as diverse as the War of 1812, the Mexican–American War, and the American Civil War, in which the cutter Harriet Lane fired the first naval shots attempting to relieve besieged Fort Sumter. The last time the Coast Guard operated as a whole within the Navy was in World War II, in all some 250,000 served in the Coast Guard during World War II.
  Coast Guard Squadron One, was a combat unit formed by the United States Coast Guard in 1965 for service during the Vietnam War. Placed under the operational control of the United States Navy, it was assigned duties in Operation Market Time. Its formation marked the first time since World War II that Coast Guard personnel were used extensively in a combat environment. The squadron operated divisions in three separate areas during the period of 1965 to 1970. Twenty-six Point-class cutters with their crews and a squadron support staff were assigned to the U.S. Navy with the mission of interdicting the movement of arms and supplies from the South China Sea into South Vietnam by Viet Cong and North Vietnam junk and trawler operators. The squadron also provided 81mm mortar naval gunfire support to nearby friendly units operating along the South Vietnamese coastline and assisted the U.S. Navy during Operation Sealords.
  Coast Guard Squadron Three, was a combat unit formed by the United States Coast Guard in 1967 for service during the Vietnam War. Placed under the operational control of the United States Navy and based in Pearl Harbor. It consisted of five USCG High Endurance Cutters operating on revolving six-month deployments. A total of 35 High Endurance Cutters took part in operations from May 1967 to December 1971, most notably using their 5" guns to provide naval gunfire support missions.
  Often units within the Coast Guard operate under Department of the Navy operational control while other Coast Guard units remain under the Department of Homeland Security.
caption: USCGC Duane (WPG-33) shelling targets in Vietnam in 1967, where they played an active role in Operation Market Time
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