In the 1789, the United States became a country. It was a huge land . And the country expanded and got bigger .But, at that time , few people lived in the U.S. The country needed immigrants. So, during the nineteenth century , millions of people moved to the U.S. The first Europeans to come to America were English,Dutch ,Spanish,and French .Then , between 1870 and 1924 ,they also came from Ireland ,Germany, Italy ,Russia, and other countries .Millions of them came to America .These immigrants worked hard. But they often made little money .Yet they slowly improved their lives .And they helped the U.S. become a great and powerful country.