HESS, HEINRICH HERMANN JOSEF, FREIHERR VON (1788-1870), Austrian soldier, entered the army in 1805 and was soon employed as a staff officer on survey work. He distinguished himself as a subaltern at Aspern and Wagram, and in 1813, as a captain, again served on the staff. In 1815 he was with Schwarzenberg. He had in the interval between the two wars been employed as a military commissioner in Piedmont, and at the peace resumed this post, gaining knowledge which later proved invaluable to the Austrian army. In 1831, when Radetzky became commander-in-chief in Austrian Italy, he took Hess as his chief-of-staff, and thus began the connexion between two famous soldiers which, like that of Blucher and Gneisenau, is a classical example of harmonious co-operation of commander and chief-of-staff. Hess put into shape Radetzky's military ideas, in the form of new drill for each arm, and, under their guidance, the Austrian army in North Italy, always on a war footing, became the best in Europe. From 1834 to 1848 Hess was employed in Moravia, at Vienna, &c., but, on the outbreak of revolution and war in the latter year, was at once sent out to Radetzky as chief-of-staff. In the two campaigns against King Charles Albert which followed, culminating in the victory of Novara, Hess's assistance to his chief was made still more valuable by his knowledge of the enemy, and the old field-marshal acknowledged his services in general orders. Lieut.-Fieldmarshal Hess was at once promoted _Feldzeugmeister_, made a member of the emperor's council, and _Freiherr_, assuming at the same time the duties of the quartermaster-general. Next year he became chief of the staff to the emperor. He was often employed in missions to various capitals, and he appeared in the field in 1854 at the head of the Austrian army which intervened so effectually in the Crimean war. In 1859 he was sent to Italy after the early defeats. He became field-marshal in 1860, and a year later, on resigning his position as chief-of-staff, he was made captain of the Trabant guard. He died in Vienna in 1870. See "General Hess" in _Lebensgeschichtlichen Hinrissen_ (Vienna, 1855).