 On representation duty, they often use a 19th c.-style dress uniform.Military schools of the French Army, including école spéciale militaire de Saint-Cyr, école militaire interarmes and école nationale des sous-officiers d'active, use full dress uniforms dating back to the 19th century worn by both students and staff.In addition to the military schools, École Polytechnique also maintains 19th century military-styled full dress uniforms.