The cold war was when the U.S. and the Soviet union almost had a nuclear war. It all started with the Cuban missile crisis. The communist planted nukes in cuba and had them there as a secret. As we all know Cuba is right off the coast of Florida and it is said that if the nuke was launched it could reach Washington D.C. in only 10 min. <span />
Slavery. At the heart of the divide between the North and the South was slavery.
States' Rights. The idea of states' rights was not new to the Civil War. ...
Expansion
consequence
The Civil War confirmed the single political entity of the United States, led to freedom for more than four million enslaved Americans, established a more powerful and centralized federal government, and laid the foundation for America's emergence as a world power in the 20th century.