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Dear Mr. Joseph Duran,
Thank you for posting your request to History Hub!
As citizens of the United States, Puerto Ricans have participated in every major United States military engagement from World War I onward. The Department of Defense has an article entitled Puerto Ricans Represented Throughout U.S. Military History which summarizes the military service of Puerto Ricans in military conflicts of the United States.
We hope you find this information helpful. Best of luck with your research!