America is a country of immigrants. Where do most immigrants come from?

During the Ice Age about 25,000 to 40,000 years ago, there were large glaciers everywhere, and the sea level was below 450 feet. It was at this time that Asian residents moved to the American continent and became the earliest original residents of the American continent, also known as Indians.

Then there were two large-scale immigrants, from Assa Bascan and Inuit and Aleutians. When the glaciers melted, everyone went by boat.

In the later exploration period, there were explorers from Spain, Portugal and Britain to develop and carve up this land. The most famous is Columbus. The earliest British colony was Virginia, and it was also one of the earliest 13 states in the United States. Virginia is named after the Virgin Queen Elizabeth.

Later, after American independence, immigrants came from all over the world, including Mexico, Canada, France, Germany, Ireland and other countries.

Early African residents were sold as slaves to the Caribbean to grow tobacco and sugar cane. Later, after European countries established colonies in North America, these slaves were sold to the United States. Most African-Americans live in the south, because the north is mostly industrialized and doesn't need so much labor.