"...the introduction by the French army of the Beaulieu 4-pounder rifled field-gun in 1858: the new artillery, though much more accurate and long-ranged than the smoothbore 'canon-obusier' it replaced (which, incidentally, was the most prevalent artillery piece of the US Civil War), was not suited to firing anti-personnel case-shot (which, in French, is called 'mitraille')." in The Mitrailleuse by Dr. Patrick Marder Military History Online
