What country is the United States called?

America is called a country of immigrants.

The United States of America, referred to as the United States for short, is a federal constitutional country, which consists of Washington, D.C., 50 states, Guam and many other overseas territories. Its main part is located in the central part of North America. 1997 was revised to 9.63 million square kilometers with a population of 320 million. It is an immigrant country with a common English. North America was originally inhabited by Indians. /kloc-at the end of 0/5, Spain, the Netherlands and other countries began to immigrate here, and Britain came from behind. 1773, Britain has established 13 colonies. 1775, the American people's war of independence against the British colonists broke out. 1776 On July 4th, the Second Continental Congress was held in Philadelphia, with George Washington as the commander-in-chief, and adopted the Declaration of Independence, officially announcing the establishment of the United States of America.