Learn about the various branches of the U.S. Military. Find out how they were formed, their role in the nation's defense, and what it's like to be a soldier in one of these branches.
Watch Your Six: Military Jet Pictures
McDonnell Douglas F-4 Phantom II
Lockheed P-38 Lightning
Does Army experience help your civilian career?
How NCO Professional Development Ribbons Work
How Army Reconnaissance Jobs Work
How Agent Orange Worked
How Anthrax Works
How Biological and Chemical Warfare Works
Anatomy of an Underwater Explosion
Why does fertilizer explode?
Can You Really Outrun an Explosion?
HowStuffWorks Illustrated: Two Legal Gun Modifications
What's the world's smallest gun?
Are robots replacing human soldiers?
Top 5 Sci-fi Weapons that Might Actually Happen
Can drones replace fighter jets?
How the Zumwalt Class Destroyer Works
How Aircraft Carriers Work
10 Financial Tips for Preparing for Deployment
How Military Video Conferencing Works
Why a Draft Would Weaken the U.S. Military
Is war murder?
What Was the First War?
10 Insane Disguises That Actually Worked
Does the U.S. Military Maintain Secret Underwater Bases?
How Code Breakers Work
YOU Can Drive a Tank!
Is the army testing an invisible tank?
AMX-13 Light Tank
The U.S. Air Force is the youngest American military branch, forming in the 20th century after the invention of the airplane. Tasked with protecting the nation's skies and supporting ground troops, the Air Force relies on the most technologically advanced military aircraft in the world.
The National Guard serves many purposes and does many jobs for the United States. But how does it differ from the U.S. Army? And what can the president authorize the Guard to do?
U.S. Coast Guard rescue swimmers routinely jump out of helicopters into dangerous waters, risking their lives to save others.
John F. Kennedy called the green beret "a symbol of excellence, a badge of courage, a mark of distinction in the fight for freedom" -- a nod to the most formidable arm of the U.S. military. The Green Berets, or Special Forces, are America's first line of defense around the world.
By Josh Clark
Delta Force is the U.S. military's most elite tactical combat group. Yet the government refuses to deny its existence. Does a well-funded secret force that, allegedly, answers only to the president make the U.S. more secure or more vulnerable?