National Defense: National defense refers to measures taken by a country to protect itself from external threats through military actions or diplomatic strategies.
Commander-in-Chief: The commander-in-chief is the highest-ranking officer in charge of all military forces within a nation. In the United States, this role is held by the President who has ultimate authority over military decisions.
War Powers Act: The War Powers Act is a federal law passed in 1973 that restricts the President's ability to commit troops into combat without congressional approval. It was enacted as a response to concerns about executive power in military matters.