US Defense Security Network

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Mission Overview

About Our Mission

Defending freedom and protecting our nation's interests through advanced military operations and unwavering commitment to excellence.

Department Overview

We Are Your Defense

The Department of Defense is America's largest government agency, committed to safeguarding the nation's security through advanced military capabilities and strategic operations.

Department of Defense

Legacy of Excellence

With roots tracing back to before the Revolutionary War, the Department of Defense has grown and evolved alongside our nation. Our primary mission is to provide the military forces necessary to deter war and ensure national security.

$841.4B

National Defense Budget

3.4M

Service Members & Civilians

4,800

Military Sites Worldwide

160+

Countries with Presence

Military Branches

U.S. Armed Forces

Elite military branches working together to defend our nation

Army
U.S. Army

Land-based military operations

Marine Corps
Marine Corps

Rapid response force

Navy
U.S. Navy

Naval and maritime operations

Air Force
Air Force

Air and space superiority

Space Force
Space Force

Space operations and defense

Coast Guard
Coast Guard

Maritime security and rescue

National Guard
National Guard

Homeland defense and support

Leadership Command

Our experienced leadership team guides strategic operations and military policy.

Secretary of Defense

Hon. Pete Hegseth

Deputy Secretary of Defense

Hon. Steve Feinberg

Chairman, Joint Chiefs of Staff

Gen. Dan Caine (Air Force)

Vice Chairman, Joint Chiefs of Staff

Adm. Christopher W. Grady (Navy)

Combatant Commands

The Department of Defense oversees 11 combatant commands. Each command has either a geographic or functional focus, providing leadership and control of military forces during peace and conflict.

Geographic Commands
Regional military operations
6 Commands
Functional Commands
Specialized operations
5 Commands
Mission Coordination
Unified command structure for maximum operational effectiveness

Our Heritage

The Department of Defense is America's oldest and most expansive government institution. From its beginnings before the Revolution to today's global operations, the DOD has played a pivotal role in defending the nation and driving innovation.

1775
Continental Army established
1947
Department of Defense created
Present
Global defense operations

The Pentagon

As the headquarters of the Department of Defense, the Pentagon is an architectural and symbolic landmark. Each year, over 100,000 visitors explore its historic halls and memorials with guided tours led by active-duty service members.

100K+
Annual Visitors
23K+
Daily Workers
Schedule Pentagon Tour

Ready to Serve Our Nation?

Join the ranks of America's finest. Explore opportunities to contribute to our nation's defense and security.

Contact Recruitment Track Personnel Return Home

Headquarters

456 Military Base Road
Washington, D.C., USA

support@usdefencesecuritynetwork.org

Office Hours

Monday - Friday:

08:00 AM - 06:00 PM

Saturday - Sunday:

Emergency Operations Only

Operations

Training & Drills Equipment Maintenance Security Services Logistics Support Emergency Response

Security Notice

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