The United States Coast Guard (USCG) is a branch of the United States Armed Forces 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.

The Coast Guard has roles in maritime homeland security, maritime law enforcement (MLE), maritime patrolsearch and rescue (SAR), marine environmental protection (MEP), and the maintenance of river, intracoastal and offshore aids to navigation (ATON). With a decentralized organization and much responsibility placed on even the most junior personnel, the Coast Guard is frequently lauded for its quick responsiveness and adaptability in a broad range of emergencies.