Military Branches

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.

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How the U.S. Navy Works

The United States Navy is the largest navy in the world. Learn how the Navy is structured, what ships it uses, what life is like in the Navy and how it has evolved over the years.


How the U.S. Air Force Works

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.

How the U.S. Coast Guard Works

Unique among the U.S. armed forces, the Coast Guard is perpetually on active duty, entrusted with lots responsibilities and chronically underfunded. Learn about the U.S. Coast Guard.

How the U.S. Army Works

The U.S. Army is one of the three main branches of the U.S. military and is primarily concerned with fighting on the ground. Learn all about the U.S. Army from sign up to discharge.

How the Navy SEALs Work

For most of us, "special ops" is what we see in the movies: soldiers trained to kill using their thumb; Charlie Sheen carrying a semi-automatic. But special operations forces are for real, and the U.S. Navy version -- the SEALs -- completes some of the most dangerous military missions. How much do you know about this elite team of fighters?