USCGC Valiant (WMEC-621) was laid down 28 February 1966 at American Ship Building Company, Lorain, Ohio, United States and launched on 14 January 1967.

Valiant has a 25 mm machine cannon mounted on the bow and is capable of firing high-explosive projectiles at a rate of 180 rounds per minute.

[1] Valiant played an important role in the 1980 Cuban Boatlift in conjunction with dozens of Coast Guard cutters, small boats, aircraft, and Navy vessels.

On 8 June 1990 the tanker Mega Borg's pump room exploded leaving the ship crippled, on fire and leaking oil.

Responding rapidly to an event 60 miles (97 km) offshore, Valiant's crew overcame complex logistical problems to mount an effective fire fighting, salvage and pollution cleanup campaign.

In 1996, Valiant was Patrol Commander for the Summer Olympic Sailing events in Savannah, Georgia, directing over 29 Coast Guard assets in providing security for 800 athletes from 98 countries.

In 1997, Valiant participated in Operation Tradewinds and trained over 500 Caribbean Coast Guard members from 12 countries in damage control, engineering, and seamanship fundamentals.

A boarding team from Valiant helped Law Enforcement Detachment (LEDET) 406 South search Cannes, resulting in the discovery of over 10,000 pounds of cocaine.

During the passage of Hurricane Lenny in November 1999, Valiant led search and rescue efforts for two missing sailing vessels in the vicinity of Saba Island.

[3] She repatriated 531 Haitians intercepted on boats as they tried flee the growing violence and turmoil fueled by rebel forces intent on removing President Jean-Bertrand Aristide from power.

[5] On 24 September 2019, the Coast Guard reported that Valiant, along with four Colombian naval assets, intercepted a 40' long drug-smuggling semi-submersible carrying 12,000 lbs.