How did the National Security act of 1947 reinforce the principle of civilian control?

The National Security Act of 1947 reinforced civilian control by establishing a framework for the organization and coordination of U.S. military and intelligence operations under civilian leadership. It created the National Security Council and the Central Intelligence Agency, both accountable to the President and Congress, ensuring that military decisions and intelligence activities remained under civilian oversight. Additionally, the act merged the Department of War and the Department of the Navy into the National Military Establishment, placing military leadership under a civilian Secretary of Defense. This structure aimed to prevent military influence over national policy, thereby strengthening democratic governance.