Query: Commodore is a naval rank in America.

Relevant passages:
Commodore (rank) <=SEP=> Commodore is a naval rank used in many navies that is superior to a navy captain , but below a rear admiral . Non-English-speaking nations often use the rank of flotilla admiral or counter admiral or senior captain as an equivalent , although counter admiral may also correspond to rear admiral .   Traditionally , `` commodore '' is the title for any officer assigned to command more than one ship at a time , even temporarily , much as `` captain '' is the traditional title for the commanding officer of a single ship even if the officer 's official title in the service is a lower rank . As an official rank , a commodore typically commands a flotilla or squadron of ships as part of a larger task force or naval fleet commanded by an admiral . A commodore 's ship is typically designated by the flying of a Broad pennant , as opposed to an admiral 's flag .   It is often regarded as a one-star rank with a NATO code of OF-6 ( which is known in the U.S. as `` rear admiral ( lower half ) '' ) , but whether it is regarded as a flag rank varies between countries .   It is sometimes abbreviated : as `` Cdre '' in British Royal Navy , `` CDRE '' in the US Navy , `` Cmdre '' in the Royal Canadian Navy , `` COMO '' in the Spanish Navy and in some navies speaking the Spanish language , or `` CMDE '' as used in the Indian Navy or in some other Navies .

United States Navy <=SEP=> The United States Navy ( USN ) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States . The U.S. Navy is the largest , most capable navy in the world , with the highest combined battle fleet tonnage . The U.S. Navy has the world 's largest aircraft carrier fleet , with ten in service , two in the reserve fleet , and three new carriers under construction . The service has 323,792 personnel on active duty and 108,515 in the Navy Reserve . It has 274 deployable combat vessels and more than 3,700 operational aircraft .   The U.S. 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 . It played a major role in the American Civil War by blockading the Confederacy and seizing control of its rivers . It played the central role in the World War II defeat of Imperial Japan . The 21st century U.S. Navy maintains a sizable global presence , deploying in strength in such areas as the Western Pacific , the Mediterranean , and the Indian Ocean . It is a blue-water navy with the ability to project force onto the littoral regions of the world , engage in forward areas during peacetime , and rapidly respond to regional crises , making it a frequent actor in U.S. foreign and military policy .   The Navy is administratively managed by the Department of the Navy , which is headed by the civilian Secretary of the Navy . The Department of the Navy is itself a division of the Department of Defense , which is headed by the Secretary of Defense . The Chief of Naval Operations ( CNO ) is a four-star admiral and the senior naval officer of the Department of the Navy . The CNO may not be the highest ranking naval officer in the armed forces if the Chairman or the Vice Chairman of the Joint Chiefs of Staff , who by law outrank the CNO , are Navy officers .