Col. Millett left the army in protest in 1973. He said we gave up on Viet Nam. He was the post commander at Ft. Devens in the mid60's. Ft Devens was the home of a secretive unit named the ASA and also the 10th SF mountain div.
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ASA is an Army Spec Ops unit specializing in Signals Intelligence that has also operated under the names "Grey Fox" and when they were tracking Pablo Escobar they used "Center Spike" Several of the personnel killed in the Israeli attack on the USS Liberty were ASA Operators and it is rumored that the reason for the attack was because the Israeli Govt. did not want the US govt to know how badly they were mauling the Egyptians. While not specifically identifying ASA Mark Bowden's book "Killing Pablo" goes into some detail about Center Spike, as does the History Channel documentary that has been on repeatedly over the past 4 or 5 years. Another good source of information is the history of the unit that was published titled "Killer Elite".
I don't recall any mention of them being based out of Devens, since I've been there on duty before it closed that is the sort of thing I would remember. Also it seems to be an awful long way from all the other Elint facilities, such as the NSA which are located around DC.