Answer:
The First World War was a watershed experience for the ethnic minorities who had come to the United States in record numbers at the turn of the last century. Though the overwhelming majority of immigrants supported their adoptive country both on the battlefield and on the home front, the United States government cracked down on enemy aliens with some of the most harshly repressive measures in American history. The Great War significantly hastened the assimilation of foreign-born soldiers and their families, changed United States immigration law, and influenced the way immigrants and enemy aliens were treated during the Second World War.
Explanation:
https://encyclopedia.1914-1918-online.net/article/ethnic_minorities_at_war_usa
