To amend title 38, United States Code, to establish certain rights for spouses of members of the uniformed services.

HR 3900 amends Title 38 of the U.S. Code to explicitly extend military benefits and protections to spouses of service members. It updates existing provisions - such as reemployment rights, health coverage, and pension protections - to apply when a spouse is absent from work due to the service member's deployment, not just when the service member is absent themselves. For example, spouses now have the same job protection rules (e.g., returning to work within 30 days after divorce, or two years after a spouse's death), and benefits terminate upon divorce with specific timelines. The bill clarifies current law rather than creating new programs, ensuring spouses are covered under existing military service-related protections.