An armed “cantinera”, a female soldier supporting chilean troops in the war against Peru and Bolivia (1879-1884), poses with her Martini-Henry rifle Comment Vintage Source
Tracer ammunition being fired from Bren guns over the heads of troops crossing a lake in collapsible boats, during a night exercise at Llanberis in Wales, 7 May 1942 Comment Vintage Source
John Letherbridge invented the first diving machine out of an air tight oak barrel the allowed the diver enough time to retrieve underwater materials. 1715] Comment Vintage Source
