Composed of an active-duty and two reserve components, learn about the Air Force's structure and more key facts.

The triad, along with assigned forces, provide 24/7 deterrence to prevent catastrophic actions from our adversaries and they stand ready, if necessary, to deliver a decisive response, anywhere, anytime.

Thousands of American service personnel are missing from previous conflicts and the Defense POW/MIA Agency remains relentless in its mission to provide the fullest possible accounting to their families and the nation, until they’re home.

The department helped make another "Mission: Impossible" possible. Military expertise, feedback and equipment provided authenticity to make the magic of Hollywood feel real.

Meet Boston's only undefeated team: the crew aboard Old Ironsides! Step aboard the oldest and toughest warship in all seven seas, which doubles as a living — and floating — museum.

Service members train and prepare year-round so when disasters strike, troops are ready to help those in harm's way. Learn how you can prepare, too.

From team to region — an interactive look at the Army's organization structure and top things to know about America's first service branch.

Undefeated in battle, the USS Constitution is more than 200 years old and still afloat. Can you emerge victorious in a quiz on this venerable Ship of State?

From Revolutionary War battlefields to today's frontlines, the Purple Heart has served as a recognition of sacrifice and heroism. How well do you know the history behind America's oldest military medal?

The Space Force structure is unique. While it is a separate and distinct branch of the armed services, it is organized under the Department of the Air Force.