FEUQUIERES, ISAAC MANASSES DE PAS, MARQUIS DE (1590-1640), French soldier and diplomatist, born at Saumur on June I, 159o, served in the Valtelline (1626), at La Rochelle (1628-29), in Lorraine, and in Germany (1636-39). He was repeatedly employed by Richelieu on diplomatic missions. He renewed at Heilbronn (April 19, 1633), the treaty of alliance with Sweden. He was also employed in the tortuous negotiations at Frankfurt in 1634. Feuquieres was killed at the siege of Thion ville (Diedenhofen). His Lettres inedites appeared (ed. Gallois) in Paris in His nephew Antoine Manasses de Pas, Marquis de Feuquieres (1648–I 71 I ), served in the French campaigns under Luxemburg and Catinat, and was given the rank of lieutenant-general as a result of his defence of Speierbach in 1692. He subsequently quarrelled with Marshal Villeroi, and failed to obtain the expected marshal's baton on the resumption of war in 1701. He spent the rest of his life compiling his memoirs, which were considered in the i8th century the standard work on the art of war, although they are embittered by his failure to obtain promotion, and coloured by his personal prejudices. The Memoires de la guerre (170I, 1711, etc., London 1736, Amsterdam subse quently) were translated into English (1737) and German (Leip zig, 1732). They deal in detail with every branch of the art of war and of military service.