Immigration After WW1
This was the greatest wave of immigration in American history. Between 1880 and 1920, more than 25 million immigrants came to America. They lived in cities because factories hired them for unskilled labor and the immigrants were willing to work for low wages. After WWI the need for unskilled labor went down. In order to limit immigration to the US, the government set up a quote system which restricted to number of immigrants that could move to the US.
The US closed the doors to immigration during the 1920's. Early on the US had excluded Chinese, Japanese, and other Asians, but later the US began to exclude even Europeans, particularly eastern and southern Europeans. Many of the immigrants that did enter America were discriminated against because of the country they were from and their race. Immigrants in America were also forced to be Americanized meaning that they had to leave their culture and language in order be discriminated against less than before.