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U.S. Department of Defense
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The Pentagon The official seal of the United States Department of Defense features a bald eagle with outstretched wings holding arrows and an olive branch, surrounded by stars and a blue border with the words Department of Defense and United States of America. U.S. military presence around the world President Harry S. Truman sits at his desk signing the National Security Act of 1947, with men in military uniforms and suits standing behind him. President Barack Obama, seen from behind, leads a meeting with the Joint Chiefs of Staff and Secretary of Defense Robert M. Gates in the Oval Office. National Security Agency National Reconnaissance Office A comparison chart displays the officer rank insignias for the United States Army, Marines, Air Force, Space Force, Navy, and Coast Guard, with each rank represented by its corresponding badge, bar, leaf, eagle, or star symbols.
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U.S. Department of Defense: Media

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The Pentagon
The Pentagon, headquarters of the U.S. Department of Defense, Arlington county, Virginia.
U.S. Department of Defense
The Department of Defense
Encyclopaedia Britannica, Inc.
National Security Act of 1947
U.S. Pres. Harry S. Truman signing the National Security Act of 1947.
Encyclopædia Britannica, Inc.
Joint Chiefs of Staff
Pres. Barack Obama (his back to the camera) holding a meeting with the Joint Chiefs...
Pete Souza—Official White House Photo
National Security Agency
National Security Agency headquarters, Fort Meade, Maryland.
Trevor Paglen
National Reconnaissance Office
National Reconnaissance Office headquarters in Chantilly, Virginia.
Trevor Paglen
Military rank insignias
Rank insignias of U.S. military officers.
Encyclopædia Britannica, Inc.

Interactives

U.S. military presence around the world
Encyclopædia Britannica, Inc.
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