What regions did most immigrants migrate from 1880-1924?

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United States
Southern and Eastern Europe

During the period from 1880 to 1924, the majority of immigrants who migrated to the United States came from the regions of Southern and Eastern Europe. This includes countries such as Italy, Russia, Poland, Austria-Hungary, and Greece, among others. These immigrants were fleeing economic hardships, political instability, and religious persecution in their home countries, and sought new opportunities and a better life in America.