United States Department of Defense
United States Department of Defense's Overview
The United States Department of Defense (DoD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government directly related to national security and the U.S. Armed Forces. The DoD is the largest employer in the world, with over 1.4 million active-duty service members, 778,000 National Guard and Reserve personnel, and over 770,000 civilian employees. Its mission is to provide the military forces needed to deter war and ensure our nation's security. The department's three main components are the Army, Navy (including the Marine Corps), and Air Force (including the Space Force).
Where is United States Department of Defense's Headquarters?
HQ Function
Serves as the central command and administrative headquarters for the U.S. Department of Defense, including the Office of the Secretary of Defense, the Joint Chiefs of Staff, and the headquarters of the military services.
Notable Features:
Iconic five-sided architectural design, one of the world's largest office buildings by floor area (approximately 6.5 million sq ft), 17.5 miles of corridors, 9/11 Memorial, central courtyard spanning 5 acres.
Work Culture:
A highly structured, mission-focused environment characterized by a blend of military and civilian personnel. Emphasizes national security, operational readiness, and adherence to protocol. Collaboration across diverse services and agencies is key.
HQ Significance:
The Pentagon is a global symbol of American military strength and serves as the nerve center for planning and executing U.S. defense policy and military operations worldwide. It is a critical national security infrastructure.
Values Reflected in HQ: The building's design and function reflect values of strength, unity of command, national security, resilience, and operational efficiency.
Location:
The Department of Defense maintains a vast global presence with hundreds of installations and facilities in numerous countries worldwide. This presence supports a wide range of functions including: forward deployment of U.S. forces for rapid response and deterrence; participation in multinational alliances (e.g., NATO, partnerships in the Indo-Pacific); security cooperation and training with partner nations; counter-terrorism operations; intelligence gathering; humanitarian assistance and disaster relief; and safeguarding global commons like sea lanes and cyberspace.
Street Address:
1400 Defense Pentagon
City:
Arlington
State/Province:
Virginia
Country:
United States
United States Department of Defense's Global Presence
Camp H.M. Smith, Hawaii, USA
Address: HQ USINDOPACOM, Box 64028, Camp H. M. Smith, HI 96861-4028
To enhance stability in the Asia-Pacific region by promoting security cooperation, encouraging peaceful development, responding to contingencies, deterring aggression, and, when necessary, fighting to win.
Stuttgart, Germany
Address: USEUCOM, Patch Barracks, APO AE 09128
To prepare ready forces, ensure strategic access, deter conflict, enable the NATO Alliance, strengthen partnerships, and counter transnational threats in order to protect and defend the United States.
MacDill Air Force Base, Tampa, Florida, USA
Address: USCENTCOM, 7115 South Boundary Boulevard, MacDill AFB, FL 33621-5101
Directs and enables military operations and activities with allies and partners to increase regional security and stability in support of enduring U.S. interests.
Buying Intent Signals for United States Department of Defense
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Executive Team of United States Department of Defense
As of April 2025, United States Department of Defense' leadership includes:
Investors of United States Department of Defense
United States Department of Defense has been backed by several prominent investors over the years, including:
Executive New Hires/Exits in the Last 12 Months
Over the past 12 months, the Department of Defense has seen key leadership transitions, most notably the appointment of a new Chairman of the Joint Chiefs of Staff and new service chiefs for the Army, Navy, and Air Force, reflecting a period of significant renewal in its top military leadership.
Departures
New Appointments:
Technology (Tech Stack) used by United States Department of Defense
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United States Department of Defense Email Formats and Examples
Email addresses within the Department of Defense typically use the '.mil' top-level domain. Common formats vary by service branch and agency but often involve a combination of first name, middle initial (optional), and last name. For example, addresses for personnel using the Defense Enterprise Email (DEE) service often follow a 'firstname.m.lastname@mail.mil' pattern. Specific branches like Army, Navy, Air Force, and Marines have their own common formats (e.g., firstname.lastname@army.mil).
firstname.m.lastname@mail.mil or [service-specific format like first.last@army.mil]
Format
john.p.doe@mail.mil
Example
15%
Success rate
News and media
U.S. Department of Defense • May 7, 2024
Department of Defense Authorizes 12th Presidential Drawdown to Support Ukraine
The Department of Defense (DOD) announced the authorization of a Presidential Drawdown of security assistance valued at up to $400 million to meet Ukraine's critical security and defense needs. This authorization is the Biden Administration's fifty-seventh tranche of equipment to be provided from DOD inventories for Ukraine since August 2021....more
U.S. Department of Defense • April 26, 2024
DOD Launches New Website, Social Media Accounts for AARO
The Department of Defense launched a new website and social media accounts for the All-domain Anomaly Resolution Office (AARO) to provide the public with information concerning AARO and its efforts to understand and resolve unidentified anomalous phenomena (UAP)....more
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