Before and during the Second World War, American industries had successfully converted to defense production as the crisis demanded, but out of the war, what Eisenhower called a permanent armaments industry of vast proportions emerged. This conjunction of an immense military establishment and a large arms industry is new in the American experience Eisenhower warned, "[while] we recognize the imperative need for this development...We must not fail to comprehend its grave implications we must guard against the acquisition of unwarranted influence…The potential for the disastrous rise of misplaced power exists and will persist." Eisenhower cautioned that the federal government’s collaboration with an alliance of military and industrial leaders, though necessary, was vulnerable to abuse of power. Ike then counseled American citizens to be vigilant in monitoring the military-industrial complex.