May 16, 2019
By Jie Zong and Jeanna Batalova
...Immigrants (click here) have long enlisted in all branches of the U.S. military, beginning with the Revolutionary War. The foreign born represented half of all military recruits by the 1840s and 20 percent of the 1.5 million service members in the Union Army during the Civil War. Today, the number of veterans who were born outside the United States stands at approximately 530,000, representing 3 percent of all 18.6 million veterans nationwide. Additionally, almost 1.9 million veterans are the U.S.-born children of immigrants. Together, the 2.4 million veterans of immigrant origin, either because they themselves are immigrants or are the children of immigrants, account for 13 percent of all veterans.
Naturalized citizens, lawful permanent residents, and certain nationals of three countries in free association with the United States—the Marshall Islands, the Federated States of Micronesia, and Palau—are eligible for military service. In addition, Congress can deem other foreign-born individuals eligible to serve if the secretary of a specific military branch determines that such enlistment is vital to the national interest....