Under a new regulation stemming from the Military Service Modernisation Act, German men aged 17 to 45 may be required to obtain permission for stays abroad exceeding three months. This legislation, effective from January 1, aims to enhance Germany's military capabilities amid increasing security concerns following Russia's invasion of Ukraine. A spokesperson from the German defense ministry explained that this requirement is to maintain a reliable military registration system, ensuring authorities are aware of individuals' locations during emergencies. The new rule gained attention after being reported by the Frankfurter Rundschau newspaper. The Modernisation Act also plans to expand the armed forces from approximately 180,000 to 260,000 active personnel by 2035. Additionally, Germany's parliament has approved voluntary military service, with all 18-year-olds receiving questionnaires regarding their interest in joining the armed forces. This travel-notification system underscores shared challenges in European military readiness while affecting NATO's collective defense strategies.