Why is there no ancient times in America?

North America was originally inhabited by Indians. By the end of 15, Spain, Britain and other countries began to immigrate to North America. Now the United States is officially founded 1776, less than 300 years. Basically, it can be said that all countries are immigrants at the beginning, which is why the United States has no history.

North America was originally inhabited by Indians. By the end of 15, Spain, Britain and other countries began to immigrate to North America. Now the United States is officially founded 1776, less than 300 years. Basically, it can be said that all countries are immigrants at the beginning, which is why the United States has no history.