The Short Version
This claim is misleading. While the U.S. Army did update Army Regulation 601-210 in March 2026 to set a new maximum enlistment age of 42, multiple credible sources confirm the policy does not take effect until April 20, 2026. Stating the age was raised "as of March 2026" conflates the announcement with implementation — a distinction that materially affects whether older applicants could actually enlist during that month.