How did the outbreak of World War 1 change the relationship of Mexican immigrants in America

The First World War brought an end to one of the biggest periods of immigration in American history. During the decade leading up to the war, an average of 1 million immigrants per year arrived in the United States, with about three-quarters of them entering through the Ellis Island immigration station in New York Harbor. The United States up to this point had an “open door” immigration policy, with no limit on the number of people who could enter the United States. Those arriving simply had to pass a medical and legal inspection to show that they would not pose a danger or burden to their new country — and 98% of those arriving at Ellis Island passed.

You can learn more in: https://www.nps.gov/articles/immigration-and-the-great-war.htm

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