What Immigration policies of the 1920s limited immigration from all which countries?

The Immigration Act of 1924 established strict quotas that severely limited immigration from countries outside of Northern and Western Europe. It effectively reduced the number of immigrants from Southern and Eastern Europe, as well as from Asia and Africa, by setting a cap based on the national origins of the U.S. population in 1890. This legislation aimed to maintain the existing ethnic composition of the United States and reflected the nativist sentiments prevalent during that era.