after the united states announced that it would withdraw from the anti-ballistic missile treaty, fort greely was selected as a site for the ground-based midcourse defense system. starting in the summer of 2002, the united states government began work on the missile defense installation at fort greely, planning to deploy a total of 25 to 30 anti-ballistic missiles by 2010. concurrently, the missile defense command took command of fort greely, relinquishing direct army control, while the army retained control of the nearby donnelly training area.