Italy's Aeronautica Militare has investigated aerial phenomena since 1933 — the longest unbroken state interest worldwide. Since 2008, the Stato Maggiore Aeronautica has systematically declassified UFO case files via the Sicurezza Aerea portal. Records spread across Aeronautica Militare archives and ufficio statistica. Source: aeronautica.difesa.it.
Cards below deep-link into the official catalogs and institutional pages. Where direct PDFs were reachable they're mirrored locally; everything else opens on the live source.