Department of Defense

The United States Department of Defense is the branch of the American government tasked with the national security of the United States and the military.

There are five main branches of the United States Armed Forces:
 * United States Air Force
 * United States Army
 * United States Coast Guard
 * United States Marine Corps
 * United States Navy

Each service operates bases, singly or in combination with other branches, in the United States and other countries around the world. Fire protection is provided by military or civilian firefighters, depending on the location. Military base fire departments are usually separate from area civilian fire departments, although they will often work in cooperation and be part of area mutual aid services.