Science | 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.


How the Green Berets Work

How the Green Berets Work

The Green Berets are America's first line of defense around the world. Learn about the role of the Green Berets and the many duties of the Green Berets. See more »

How NORAD Works

How NORAD Works

NORAD is a military operation that is jointly run by the United States and Canada. Learn about NORAD and the unique location for the NORAD headquarters. See more »

How is the National Guard different from the regular Army?

How is the National Guard different from the regular Army?

The National Guard serves many purposes and does many jobs for the United States. Learn what the National Guard is and how it differs from the Army. See more »

How the U.S. Marines Work

How the U.S. Marines Work

The Marines are the smallest branch of the military and project power from Navy ships. See more »

How the U.S. Navy Works

How the U.S. Navy Works

The U.S. Navy is the biggest in the world. It is divided into operating forces and shore establishment. See more »

How the U.S. Air Force Works

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. Learn about the history of the Air Force, how it's structured, the process of joining and leaving, and life during time served. See more »

How the U.S. Coast Guard Works

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. See more »

How the U.S. Army Works

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. See more »

How the Navy SEALs Work

How the Navy SEALs Work

Navy SEALs complete some of the most dangerous U.S. military missions. Learn about how the Navy SEALs work and what it takes to become a SEAL. See more »