Supreme Court should be the right answer
The Atlantic Ocean. Its the ocean that connects North and South America to Europe. Most early explorers came from Europe and "discovered" the Americas. The slave trade as well as spice trade used the Atlantic ocean because it's the most direct way from most of Europe.
It was a strategic point in the Tennessee River. The union wanted to gain control of the tributaries that flowed into the Mississippi River. Southern troops were not defending this place. It was a stronghold protecting the North.
NAFTA has purely economic goals
The constitution defines citizenship in the 14th amendment.<span />