Final answer:
The National Security Act of 1947 reflected the commitment to containing Soviet expansion and reorganized the U.S. military.
Step-by-step explanation:
The National Security Act of 1947 reflected the commitment to containing Soviet expansion and the need for a strong military offense and defense. It reorganized the U.S. military, creating the National Security Council and the Central Intelligence Agency (CIA). The act also established the Department of Defense, which combined the Departments of the Army and Navy with the Department of the Air Force.