What makes the geography of the United States so unique ?

The U.S. borders both the North Atlantic and North Pacific Oceans and is bordered by Canada and Mexico. It is the third-largest country in the world by area and has a varied topography. The eastern regions consist of hills and low mountains, while the central interior is a vast plain (called the Great Plains region).

the answer is a glaciers carved a large valley that later flooded and became puget sound

haitian revolution slaves initiated the rebellion in 1791 and by 1803 they had succeeded in ending not just slavery but french control over the colony