In addition to port security, ship inspection and safety, law enforcement, and search and rescue, the U.S. Coast Guard assumes an important role in national defense at home and abroad. To that end, the Coast Guard has carried out separate and coordinated missions with other armed forces from the Great Lakes to the Atlantic, Pacific, Gulf of Mexico, Mediterranean, Persian Gulf, and North Polar region. This chronicle of the Coast Guard's contributions to national defense examines participation in World War I, World War II, Korea, the Cold War, Vietnam, and the War on Terror. Among the topics explored are defense threats, drug trafficking, and border security, as well as Coast Guard personnel, training, leadership, and assets.

At home and overseas, the United States Coast Guard served a variety of vital functions in World War II, providing service that has been too little recognized in histories of the war. Teaming up with other international forces, the Coast Guard provided crewmembers for Navy and Army vessels as well as its own, carried troops, food, and military supplies overseas, and landed Marine and Army units on distant and dangerous shores. This thorough history details those and other important missions, which included combat engagement with submarines and kamikaze planes, and typhoons. On the home front, port security missions involving search and rescue, fire fighting, explosives, espionage and sabotage presented their own unique dangers and challenges.

The Code of Federal Regulations is the codification of the general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government.

As the official handbook of the Federal Government, this manual provides comprehensive information on quasi-official agencies, international organizations in which the US participates, and boards, commissions and committees.