Fascinating…
From The New Yorker:
One core idea dominates every version: the first draft described “the conjunction of a large and permanent military establishment and a large and permanent arms industry.” Policing it would require “all the organizing genius we possess” to insure “that liberty and security are both well served.” It added, “We must be especially careful to avoid measures which would enable any segment of this vast military-industrial complex to sharpen the focus of its power.” Through scores of revisions, that idea persisted. As delivered, the speech memorably read, “In the councils of government, we must guard against the acquisition of unwarranted influence, whether sought or unsought, by the military-industrial complex.”
More: New drafts of Eisenhower’s farewell address : The New Yorker.