Toussaint-Henry-Joseph Fafchamps
Joseph Montigny further improved the weapon, completing the transportable 37-barrels Montigny mitrailleuse (also known as the "Fafschamps-Montigny mitrailleuse") in 1863. From 1859, Joseph Montigny proposed his design to Napoleon III, which led to the development of the French Reffye mitrailleuse, designed by Jean-Baptiste Verchère de Reffye with the collaboration of Montigny, and which was adopted by the French Army in 1865. The invention of Fafschamps thus became the basis of the "mitrailleuse", which was used by the French in the Franco-Prussian War of 1870. Initially kept under wraps as a secret weapon, it became widely used in battle by French artillery during the Franco-Prussian War (1870–71).
Mitrailleuse
The Prussians and foreign observers were not impressed by the performance of the mitrailleuse. In the case of the Prussians, their views were undoubtedly coloured by propaganda. They had very few machine guns or volley guns of their own and, not least for reasons of maintaining morale in the face of a new weapon technology, they scorned the effectiveness of the mitrailleuse. They nonetheless saw the weapon as a threat and Prussian artillery always made it a priority to engage and destroy mitrailleuse batteries. The weapon's characteristic "snarling rasp" does appear to have made some impression—the Prussian troops called the mitrailleuse the ""Höllenmaschine"" ("Hell Machine, Infernal Machine")