Helmet
Stahlhem - German steel helmet originally designed and used in 1916 and last fielded and used in 1992 by the Chilean Army ( Which was trained by the Prussians back in the 19th century and still follow the style of the Germans. Yup, they Goose Step when they march in their ceremonies and play German military music. ) it was so much better than anyone else had that back in the late 70's, the U.S. Army decided to copy it and fielded " The Fritz " helmet made with Kevlar in the 80's and still uses today with slight modifications.