'French Mitrailleuse in Action', c1872. Machine gun used by the French army during the Franco-Prussian War of 1870-1871. The mitrailleuse was a type of volley gun that could fire rounds at once or in rapid succession. From "The Franco-Prussian War: its causes, incidents and consequences", Volume I, by Captain H M Hozier. [William Mackenzie, London, 1872]