François-Jean de Mesnil-Durand  François Jean de Graindorge d'Orgeville, baron de Mesnil-Durand, known as François-Jean de Mesnil-Durand (1 September 1736, Mesnil-Durand - 13 thermidor year VII, i.e. 31 July 1799, London) was a French tactician. He collaborated with marshal de Broglie and supported the "ordre profond".