How long did southern eastern Europe immigrants provide labor for industrialization?

Southeastern European immigrants began arriving in significant numbers in the late 19th and early 20th centuries, primarily between 1880 and 1920, to provide labor for industrialization in the United States and other industrialized nations. They contributed to various sectors, including manufacturing, mining, and construction. This influx of labor continued until the onset of restrictive Immigration policies in the 1920s, which curtailed further immigration. Overall, their labor was crucial in supporting the rapid industrial growth during this transformative period.