

At first the cut and style of the uniform differed considerably between ranks, and specific rank insignia were only sporadically used. Uniforms for naval officers were not authorised until 1748.

The chief of naval operations (CNO) is the most senior Navy officer serving in the Department of the Navy.See also: Royal Navy ranks, rates, and uniforms of the 18th and 19th centuries Royal Navy epaulettes for senior and junior officers, 18th and 19th centuries Royal Navy epaulettes for flag officers, 18th and 19th centuries The Department of the Navy is itself a military department of the Department of Defense, which is headed by the secretary of defense. The Department of the Navy is headed by the civilian secretary of the Navy. The United States Navy is part of the Department of the Navy, alongside the United States Marine Corps, which is its coequal sister service. It is a blue-water navy with the ability to project force onto the littoral regions of the world, engage in forward deployments during peacetime and rapidly respond to regional crises, making it a frequent actor in American foreign and military policy. The modern United States Navy maintains a sizable global presence, deploying in strength in such areas as the Western Pacific, the Mediterranean, and the Indian Ocean. The United States Navy emerged from World War II as the most powerful navy in the world. It played the central role in the World War II defeat of Imperial Japan. The United States Navy played a major role in the American Civil War by blockading the Confederacy and seizing control of its rivers. After suffering significant loss of goods and personnel at the hands of the Barbary pirates from Algiers, the United States Congress passed the Naval Act of 1794 for the construction of six heavy frigates, the first ships of the Navy. The United States Navy traces its origins to the Continental Navy, which was established during the American Revolutionary War and was effectively disbanded as a separate entity shortly thereafter. Occupation of the Dominican Republic (1965)
