It separates North and South Korea. It was the border between them since the Korean war that was led over the unification of the country. The northeners wanted to have a fully communist Korea while the southerners wanted to have a western oriented Korea.
It would be the "Necessary and Proper Clause" that establishes many implied powers of Congress, since this allows Congress to do whatever is "necessary and proper" to keep the United States functioning.
The Haitian Revolution has often been described as the largest and most successful slave rebellion in the Western Hemisphere. Slaves initiated the rebellion in 1791 and by 1803 they had succeeded in ending not just slavery but French control over the colony.
Most slaves brought to America from Africa were purchased from black slave Owners
