The Constitution of the United States divides the war powers of the federal government between the Executive and Legislative branches: the President is the Commander in Chief of the armed forces (Article II, section 2), while Congress has the power to make declarations of war, and to raise and support the armed forces.The founding father did this to prevent the majority from ruling with an iron fist.
A region deals with one specific place, but a theme can apply in many places.
The answer is Judicial review
A lot of sea expeditions, and because not much of the world was known
