Great Migration: The mass movement between 1916 and 1970 when millions of African Americans relocated from rural areas in the South to urban areas in the North and Midwest seeking employment opportunities.
Trail of Tears: Refers specifically to forced relocation experienced by Native American tribes such as Cherokee Nation during which thousands lost their lives while being forcefully moved westward by the U.S. government.
Immigration Act of 1924 (Johnson-Reed Act): This legislation significantly restricted immigration into the United States by establishing quotas based on nationality. It aimed at reducing the number of immigrants from Southern and Eastern European countries.