The United States of America (USA)
The United States of America (USA) is a country located in North America, bordered by Canada to the north, Mexico to the south, and the Atlantic and Pacific Oceans to the east and west respectively. The country has a total area of 3.8 million square miles (9.8 million square kilometers) and a population of over 330 million people. The USA is known for its diverse geography, ranging from the Rocky Mountains in the west to the Appalachian Mountains in the east, and from the Great Lakes in the north to the Gulf of Mexico in the south. The country is also home to many major cities, including New York, Los Angeles, Chicago, and Houston. The USA has a federal system of government, with power divided between the national government and the individual states. The country is a founding member of the United Nations and a leading economic and military power in the world.