Forrestal 1947-1949 First Secretary, established the department during the Cold War's onset. The transition to the post-Cold War period, marked by the Gulf War, introduced a new set of strategic priorities focused on technology and rapid deployment.
Former Secretaries of Defense History and Key Eras
Key Eras and Defining Challenges As the secretary of defense list progresses through the Cold War era, names like Robert S. Adaptation to asymmetric threats, terrorism, and irregular warfare in the 21st century.
McNamara become synonymous with massive military industrial expansion and the controversial management of Vietnam. The first secretary, James V.
Former Secretaries of Defense History and Key Eras
His successor, Louis A. McNamara 1961-1968 Oversaw massive escalation in Vietnam; emphasized systems analysis.
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