a Japanese military organization for defence called the Air Self-Defense Forces
a joint military organization of Canada and the United States, called {North American Air Defense Command}
the four air space units of the U.S. Armed Forces which are divided into the North American Air Space Defense Headquarters, Strategic Air Command, Air Transportation Command, and Space Command
the agency that administers the Army National Guard and the Air National Guard
joint military organization of the U.S.A. and Canada called {North American Aerospace Defence Command}
the American Legion