Los Angeles Air Defense Region was created in 1942.
San Francisco Air Defense Region was created in 1942.
San Francisco Air Defense Region ended in 1945.
IX Air Defense Command was created in 1944.
Detroit Air Defense Sector was created in 1958.
Highlands Army Air Defense Site was created in 1958.
Air Defense Artillery Branch - United States - was created in 1968.
* Beale Air Force Base. * Edwards Air Force Base. * Los Angeles Air Force Base. * Vandenberg Air Force Base. * Presidio of Monterey (Defense Language Institute)
Southeast Air Defense Sector ended in 2006.
IX Air Defense Command ended in 1946.
Detroit Air Defense Sector ended in 1966.
The IM 99A and IM 99B were umanned interceptors assigned to Air Defense Command and ultimately, NORAD. It was flown by remote control from the air defense region command blockhouse located around the country. If launched it was on a one way trip as it would be directed to a bomber formation and then exploded. It was ramjet powered and could approach Mach 4. A very effective air defense system against manned bomber attack.
Highlands Army Air Defense Site ended in 1974.