General Military Functions

Foundation — Key West Agreement

Key West Revision 1958

1. Support and defend the U.S. Constitution against all enemies, foreign and domestic
2. Ensure, by timely and effective military action, the security of the United States, its possessions, and areas vital to its interests
3. Uphold and advance the national policies and interests of the United States

Service Cooperation

• Observe the general principles and fulfill the specific functions as established in the Key West Agreement
• Make use of the personnel, equipment, and facilities of the other services in all cases where economy and effectiveness will be increased

Functions of the United States Army

Army Mission

Army Responsibilities

• Preparation of land forces necessary for the effective prosecution of war
• Expansion of peacetime components of the Army to meet the needs of war
• Developing weapons, tactics, technique, organization, and equipment of Army combat and service elements
• Coordinating with the Navy and the USAF in all aspects of joint concern, including those which pertain to amphibious and airborne operations

Army Specific Functions

1. Operations on land, including joint operations
2. The seizure or defense of land areas, including airborne and joint amphibious operations
3. The occupation of land areas

Functions of the United States Navy

• Winning wars
• Deterring aggression
• Maintaining freedom of the seas

Navy Composition

• Naval combat and service forces
• Naval aviation
• The Marine Corps

Navy Organization

Navy Largest in World

• The highest combined battle fleet tonnage
• The world's largest aircraft carrier fleet

Navy Responsibilities

• Is responsible for the preparation of naval forces necessary for the effective prosecution of war
• Will develop weapons, tactics, technique, organization, and equipment of naval combat and service elements
• Coordinates with the Army and the USAF in all aspects of joint concern, including those which pertain to amphibious operations

Navy Specific Functions

1. Operations at sea, including joint operations
2. The control of vital sea areas, the protection of vital sea lanes, and the suppression of enemy sea commerce
3. The support of occupation forces as required
4. The seizure of minor enemy shore positions capable of reduction by such landing forces as may be comprised within the fleet organization
5. Naval reconnaissance, antisubmarine warfare, and protection of shipping

Functions of the United States Marine Corps

1. Provide marine forces with supporting components for service in the seizure or defense of advanced naval bases and for the conduct of limited land operations in connection therewith
2. Develop, in coordination with the Army and the USAF, those phases of amphibious operations which pertain to the tactics, technique, and equipment employed by landing forces
3. Provide detachments and organizations for service on armed vessels of the Navy
4. Provide security detachments for protection of naval property at naval stations and bases
5. Provide, as directed by proper authority, such missions and detachments for service in foreign countries as may be required to support the national policies and interests of the United States

Marine Corps Foreign Service

Marine Corps Service Support

Functions of the United States Coast Guard

Coast Guard Department

• Operating as part of the Navy on declaration of war
• When the U.S. President directs

Major Coast Guard Functions

1. Enforce or assist in the enforcement of all applicable federal laws on, under, and over the high seas and waters subject to the jurisdiction of the United States 2. Engage in maritime air surveillance or interdiction to enforce or assist in the enforcement of the laws of the United States 3. Administer laws and promulgate and enforce regulations for the promotion of safety of life and property on and under the high seas and waters subject to the jurisdiction of the United States, covering all matters not specifically delegated by law to some other executive department 4. Develop, establish, maintain, and operate, with due regard to the requirements of national defense: - Aids to maritime navigation - Icebreaking facilities - Rescue facilities 5. Pursuant to international agreements, develop, establish, maintain, and operate icebreaking facilities on, under, and over waters other than the high seas and waters subject to the jurisdiction of the United States 6. Engage in oceanographic research of the high seas and in waters subject to the jurisdiction of the United States 7. Maintain a state of readiness to function as a specialized service in the Navy in time of war, including the fulfillment of Maritime Defense Zone command responsibilities

Functions of the USAF

• Air offensive operations
• Air defensive operations

USAF Responsibilities

• Preparation necessary for the effective prosecution of war except as otherwise assigned
• Expansion of the peacetime components of the USAF to meet the needs of war

USAF Coordination

• Provide the means for coordination of air defense among all services
• Assist the Army and Navy in accomplishment of their missions, including the provision of common services and supplies as determined by proper authority

USAF Specific Functions

1. Air operations including joint operations
2. Gaining and maintaining general air supremacy
3. Establishing local air superiority where and as required
4. The strategic force of the United States and strategic air reconnaissance
5. Airlift and support for airborne operations
6. Air support to land forces and naval forces, including support of occupation forces
7. Air transport for the U.S. Armed Forces, except as provided by the Navy
8. Develop weapons, tactics, technique, organization and equipment of USAF combat and service elements, coordinating with the Army and Navy on all aspects of joint concern, including those which pertain to amphibious and airborne operations

Functions of the United States Space Force

• Air forces
• Space forces
• Cyberspace forces

…both combat and support, not otherwise assigned.

USAF + Space Force Principal Forces

DAF Mission

• Prompt and sustained combat operations
• Military engagement
• Security cooperation in defense of the nation

…and to support the other Military Services and joint forces.

Global Vigilance, Reach, Power

• Global Vigilance
• Global Reach
• Global Power

…in the form of in-place, forward-based, and expeditionary forces possessing the capacity to deter aggression and violence by state, non-state, and individual actors to prevent conflict, and, should deterrence fail, prosecute the full range of military operations in support of U.S. national interests.

Space Force Specific Functions

1. Provide freedom of operation for the United States in, from, and to space
2. Provide prompt and sustained space operations
3. Protect the interests of the United States in space
4. Deter aggression in, from, and to space
5. Conduct space operations