The Joint Chiefs of Staff (JCS) is the body of the most senior uniformed leaders within the United States Department of Defense, which advises the president of the United States, the secretary of defense, the Homeland Security Council and the National Security Council on military matters. The composition of the Joint Chiefs of Staff is defined by statute and consists of a chairman (CJCS), a vice chairman (VJCS), the chiefs of the Army, Marine Corps, Navy, Air Force, Space Force, and the chief of the National Guard Bureau. Each of the individual service chiefs, outside their JCS obligations, works directly under the secretaries of their respective military departments, e.g. the secretary of the Army, the secretary of the Navy, and the secretary of the Air Force.
The United States Fleet Forces Command (USFFC) is a service component command of the United States Navy that provides naval forces to a wide variety of U.S. forces. The naval resources may be allocated to Combatant Commanders such as United States Northern Command (USNORTHCOM) under the authority of the Secretary of Defense. Originally formed as United States Atlantic Fleet (USLANTFLT) in 1906, it has been an integral part of the defense of the United States of America since the early 20th century. In 2002, the Fleet comprised over 118,000 Navy and Marine Corps personnel serving on 186 ships and in 1,300 aircraft, with an area of responsibility ranging over most of the Atlantic Ocean from the North Pole to the South Pole, the Caribbean Sea, Gulf of Mexico, and the waters of the Pacific Ocean along the coasts of Central and South America.
The defense readiness condition (DEFCON) is an alert state used by the United States Armed Forces. For security reasons, the US military does not announce a DEFCON level to the public.
The chairman of the Joint Chiefs of Staff (CJCS) is the presiding officer of the Joint Chiefs of Staff (JCS). The chairman is the highest-ranking and most senior military officer in the United States Armed Forces and the principal military advisor to the president, the National Security Council, the Homeland Security Council, and the secretary of defense. While the chairman of the Joint Chiefs of Staff outranks all other commissioned officers, the chairman is prohibited by law from having operational command authority over the armed forces; however, the chairman assists the president and the secretary of defense in exercising their command functions.
The United States Second Fleet is a numbered fleet in the United States Navy responsible for operations in the East Coast and North Atlantic Ocean. Established after World War II, Second Fleet was deactivated in 2011, when the United States government believed that Russia's military threat had diminished, and reestablished in 2018 amid renewed tensions between NATO and Russia.
United States Space Command is a unified combatant command of the United States Department of Defense, responsible for military operations in outer space, specifically all operations 100 kilometers and greater above mean sea level. U.S. Space Command is responsible for the operational employment of space forces that are provided by the uniformed services of the Department of Defense.
The United States Indo-Pacific Command (USINDOPACOM) is the unified combatant command of the United States Armed Forces responsible for the Indo-Pacific region.
The United States Transportation Command (USTRANSCOM) is one of the eleven unified commands of the United States Department of Defense. In both times of peace and war, USTRANSCOM's role is to provide the Department of Defense with air, land, and sea transportation. USTRANSCOM was founded in 1987 and is based at Scott Air Force Base in Illinois.
The United States Southern Command (USSOUTHCOM), located in Doral in Greater Miami, Florida, is one of the eleven unified combatant commands in the United States Department of Defense. It is responsible for providing contingency planning, operations, and security cooperation for Central and South America, the Caribbean, their territorial waters, and for the force protection of U.S. military resources at these locations. USSOUTHCOM is also responsible for ensuring the defense of the Panama Canal and the canal area.
The United States Joint Forces Command (USJFCOM) was a Unified Combatant Command of the United States Department of Defense. USJFCOM was a functional command that provided specific services to the military. The last commander was Army Gen. Ray Odierno and the Command Senior Enlisted was Marine Sergeant Major Bryan B. Battaglia. As directed by the President to identify opportunities to cut costs and rebalance priorities, Defense Secretary Robert Gates recommended that USJFCOM be disestablished and its essential functions reassigned to other unified combatant commands. Formal disestablishment occurred on 4 August 2011.
The United States European Command (EUCOM) is one of the eleven unified combatant commands of the United States military, headquartered in Stuttgart, Germany. Its area of focus covers 21,000,000 square miles (54,000,000 km2) and 51 countries and territories, including Europe, The Caucasus, Russia and Greenland. The Commander of the United States EUCOM simultaneously serves as the Supreme Allied Commander, Europe (SACEUR) within NATO, a military alliance. During the Gulf War and Operation Northern Watch, EUCOM controlled the forces flying from Incirlik Air Base.
A unified combatant command, also referred to as a combatant command (CCMD), is a joint military command of the United States Department of Defense that is composed of units from two or more service branches of the United States Armed Forces, and conducts broad and continuing missions. There are currently 11 unified combatant commands, and each is established as the highest echelon of military commands, in order to provide effective command and control of all U.S. military forces, regardless of branch of service, during peace or during war time. Unified combatant commands are organized either on a geographical basis or on a functional basis, e.g., special operations, force projection, transport, and cybersecurity. Currently, seven combatant commands are designated as geographical, and four are designated as functional. Unified combatant commands are "joint" commands and have specific badges denoting their affiliation.
The United States Naval Forces Europe and Africa (NAVEUR-NAVAF), is the United States Navy component command of the United States European Command and United States Africa Command. Prior to 2020, NAVEUR-NAVAF was previously referred to as United States Naval Forces Europe – Naval Forces Africa and sometimes referred to as United States Naval Forces Europe – Africa.
The National Military Command Center (NMCC) is a Pentagon command and communications center for the National Command Authority. Maintained by the Department of the Air Force as the "DoD Executive Agent" for NMCC logistical, budgetary, facility, and systems support; the NMCC operators are in the Joint Staff's J-3 (Operations) Directorate. "The NMCC is responsible for generating Emergency Action Messages (EAMs) to missile launch control centers, nuclear submarines, recon aircraft, and battlefield commanders".
The Supreme Allied Commander Atlantic (SACLANT) was one of two supreme commanders of the North Atlantic Treaty Organisation (NATO), the other being the Supreme Allied Commander Europe (SACEUR). The SACLANT led Allied Command Atlantic was based at Norfolk, Virginia. The entire command was routinely referred to as 'SACLANT'.
The United States Africa Command is one of the eleven unified combatant commands of the United States Department of Defense, headquartered at Kelley Barracks, Stuttgart, Germany. It is responsible for U.S. military operations, including fighting regional conflicts and maintaining military relations with 53 African nations. Its area of responsibility covers all of Africa except Egypt, which is within the area of responsibility of the United States Central Command. U.S. AFRICOM headquarters operating budget was $276 million in fiscal year 2012.
Area of responsibility (AOR) is a pre-defined geographic region assigned to Combatant commanders of the Unified Command Plan (UCP), that are used to define an area with specific geographic boundaries where they have the authority to plan and conduct operations; for which a force, or component commander bears a certain responsibility. The term may also be used in other countries worldwide but it originated within the United States Armed Forces. This system is designed to allow a single commander to exercise command and control of all military forces in the AOR, regardless of their branch of service.
In 1961 the United States Strike Command (STRICOM) was established at MacDill Air Force Base as a unified combatant command capable of responding to global crises. The name of the command was originally derived from the acronym for Swift Tactical Reaction In Every Known Environment (STRIKE). It integrated the CONUS-based forces of the Army's Continental Army Command and the Air Force's Composite Air Strike Force (CASF) and Tactical Air Command.
Admiral Jerauld Wright was an officer in the United States Navy. He served as the Commander-in-Chief of the United States Atlantic Command (CINCLANT) and the Commander-in-Chief of the United States Atlantic Fleet (CINCLANTFLT), and became the second Supreme Allied Commander Atlantic (SACLANT) for the North Atlantic Treaty Organization (NATO), from April 1, 1954, to March 1, 1960, serving longer in these three positions than anyone else in history.
Continental Air Defense Command (CONAD) was a Unified Combatant Command of the United States Department of Defense, tasked with air defense for the Continental United States. It comprised Army, Air Force, and Navy components. It included Army Project Nike missiles anti-aircraft defenses and USAF interceptors. The primary purpose of continental air defense during the CONAD period was to provide sufficient attack warning of a Soviet bomber air raid to ensure Strategic Air Command could launch a counterattack without being destroyed. CONAD controlled nuclear air defense weapons such as the 10 kiloton W-40 nuclear warhead on the CIM-10B BOMARC. The command was disestablished in 1975, and Aerospace Defense Command became the major U.S. component of North American Air Defense Command (NORAD).
