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100th Missile Defense Brigade (Ground-based Midcourse Defense), known as 100th MDB (GMD), is a multi-component (meaning both Title 10 and Title 32) United States
Army National Guard The Army National Guard (ARNG) is an organized Militia (United States), militia force and a Reserve components of the United States Armed Forces, federal military reserve force of the United States Army. It is simultaneously part of two differen ...
brigade headquartered at Schriever Space Force Base, Colorado. It has component formations located in
Fort Greely Fort Greely is a United States Army launch site for anti-ballistic missiles located about southeast of Fairbanks, Alaska, Fairbanks, Alaska. It is also the home of the Cold Regions Test Center (CRTC), as Fort Greely is one of the coldest areas ...
, Alaska,
Vandenberg Space Force Base Vandenberg Space Force Base , previously Vandenberg Air Force Base, is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the ...
, California, and Fort Drum, New York manned by national guardsmen of the 49th Missile Defense Battalion,Barry Rosenber
(29 Nov 2022) Here’s how the soldiers assigned to shoot down ballistic missiles from North Korea stay sharp
100th and 49th Missile Defense Brigade and Battalion, CO and AK respectively
100th MDB, Detachment 1,Sgt. Benjamin Crane, 100th Missile Defense Brigade (Ground-based Midcourse Defense) Public Affairs (May 31, 2011) Detachment One formally activated, changes commanders
/ref> and 100th MDB, Detachment 2 in
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
, California, and New York, respectively, on a round-the-clock 24/7/365 basis.The 100th Missile Defense Brigade: A decade of transformation and mission success.
/ref> Staff Sgt. Zachary Sheely, 100th Missile Defense Brigade (GMD) (12 May 2020) America’s only missile defense brigade 'deployed in place'
100th MDB has created backup crews which sequester during their Title-10 duty shifts, which last 14 days. The crews are cross-training for their periods of duty. The AK and CO crew locations serve the same mission.
100th MDB (GMD) is part of the United States Army Space and Missile Defense Command.


Operational Concept

The mission of 100th MDB (GMD) is ground-based mid-course defense (GMD) of the
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. A sensor network of satellites, sea-based radars, and land-based radars detect enemy ballistic missile attack by tracking launches, following the trajectories, and determining if these trajectories are headed for the U.S. homeland.
Ground-based interceptor The Ground-Based Interceptor (GBI) is the anti-ballistic missile component of the United States' Ground-Based Midcourse Defense (GMD) system. Description This interceptor is made up of a boost vehicle, constructed by Orbital Sciences Corporatio ...
s (GBI) then intercept these missiles, mid-course.Test results can be found at: Ground-based Midcourse Defense#Intercept tests. The mission was proven in 2006, 2009, and 2012 by the North Korean Taepodong 2 ICBM launches.(18 December 2017) In Their Words: Missile defense crew recounts intercontinental ballistic missile target flight test
/ref>


Initial formation

In 2001
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notified the government of
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of plans to withdraw the US from the Anti-Ballistic Missile Treaty. This entailed the development of multiple anti-ballistic missile sites, a restriction of the ABM Treaty. Activated in 2003,Staff Sgt. Zachary Sheely (October 31, 2018) None Shall Pass: 100th Missile Defense Brigade marks 15 years of homeland missile defense
/ref> the administration deemed the Ground-based Midcourse Defense to be operational on 30 Sep 2004. The initial operational capability involved intensive simulation carried out by 100th MDB (GMD), which works with the sensor networks of the Missile Defense Agency.


National Guard participation

As National Guardsmen, the tempo of personnel replacements are not subject to the three-year cycle of ARFORGEN, allowing the development of long-term expertise over the past decade of training.(December 11, 2017) Nine Soldiers graduate ICBM defense course
(Both Active Army and National Guard soldiers take the GQC)


Notes

{{DEFAULTSORT:100th Missile Defense Command Brigades of the United States Army Missile defense Space units and formations of the United States Army