Research ReportCRS In FocusVersion 3
IF12068
U.S. Nationals and Foreign Military Service
Published Mar 28, 2022Updated Jun 21, 2025
Full report
What this is
The Congressional Research Service is a nonpartisan policy and legal analysis arm of the Library of Congress. CRS reports are written for members of Congress and their staff, not the public — but they’re made available openly through Congress.gov.