Boston Defense Area (B or BO): Boston's Nike Batteries were manned initially by Regular Army troops. In 1959, National Guard units assumed control of B-03, B-15, B-55, and B-63. In 1964, the Army turned sites B-36 and B-73 over to the Guard. After the phase-out of the Nike Ajax system, sites B-05, B-36, and B-73 remained supplied with Hercules missiles.
Army Air-Defense Command Post (AADCP) B-21DC established at Fort Heath, MA in 1960 for Nike missile command-and-control functions. The site was an AN/FSG-l Missile-Master Radar Direction Center. In early 1965 the AN/TSQ-51 "Missile Mentor" solid-state computer system was installed. B-21DC was integrated with the USAF Air Defense Command/NORAD Semi Automatic Ground Environment (SAGE) air defense radar network as Site MM-1.
The Boston Defense Area merged with Hartford & Providence Defense Areas in 1962, becoming the New England Defense Area. Air Force operations at the site ended in 1962, and Nike operations were inactivated in 1974.
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