Which 4 acts were introduced to limit immigration to the US in 1920's?

In the 1920s, the U.S. implemented several key acts to limit Immigration, including the Immigration Act of 1921, which established numerical limits on immigration based on national origins. This was followed by the Immigration Act of 1924, which further restricted immigration by introducing a quota system favoring Northern and Western Europeans. The Asian Exclusion Act of 1924 specifically barred immigration from Asia, while the Johnson-Reed Act reinforced these quotas, solidifying racial and ethnic restrictions on immigration during that era.