lie spent the next few years in commeecial pursuits of a desultory kind; and was beginning to establish himself as a stockbroker, when he became acquainted with General Ney, and his future pursuits were fixed. Supported by the powerful recommendation of that general, ho received a minable appointment In one of the large mercantile houses of Paris; with ample leisure to pursue his studies of military tactics, which he had begun as a mere boy, but which had been Inter rupted by the conquest of his country. In 1804, at the age only of twenty-five, he produced the first part of his Trait6 des Grandes 0p6ratione Militaires,' which determined Ney to attach him perma nently to the French army, and to recommend him to the First Consul. Shortly after he was appointed aide-do-camp to that general, with the rank of chef•do-bataillon. For the five ensuing years, Jomini attended the marshal in every campaign, and exhibited as much skill in the closet as daring in the field. At Miehelaberg he led the storming party and carried the heights ; and in 1805, the clear and decided plan he drew up for the lino of march of the sixth corps, contributed to the capture of Mach's army. Meanwhile, Napoleon, who had read and approved of his Tralt6,' made him a colonel. lie distinguished himself also in the campaign of Prussia, In 1806, especially at the battle of Jena, In the very crisis of which he rescued Marshal Ney from a most perilous position, when sorely pressed by Prince Hohenlohe. For this exploit ho was created a baron. Colonel Jomini accompanied Marshal Ney into Spain in 1808; but In 1809, his enemies, jealous of the consideration he had acquired by his strategical skill, found means to prejudice his benefactor against him, and Colonel Jomini was suspended for a time from active service. Mortified by this treatur nt, the colonel applied for his discharge In 1810, having already determined to enter the Russian service. The Freuch Emperor however refused to part with him, and promoted him to a brigade. Not long after this, General Jomini was appointed historiographer of the empire, and when the Russian campaign was opened, in 1812, lie was com missioned to write the history of the Grando Armde. Few officers
exhibited more zeal or greater fortitude thau Jomini throughout this disastrous expedition ; his real talents were now appreciated, ho was made governor of Willett, then of Smolenako, and ho again rescued Marshal Ney from a position of great peril.
After the battle of Lutzen, in 1818, he returned to the staff of Marshal Nay ; soon after ho distinguished himself so much at the Evade of llautzen, that Ney urged the emperor to make Jomini a general of division. Far from complying, Napoleon, ou some new ground of displeasure, suspended him a second time. Irritated by this treatment, General Jomlui resolved to break for over with Napo leon; he therefore accepted the rank of lieutenant-general In the Itunien army, was tried by court-martial for desertion of that which he had left, end though absent, sentenced to bo shot. Still, in spite of this appointment, General Jomini did not take an active part in the war of 1814 against France. In 1815 lie returned to Paris for a short time, and received the cross of St. Louie from the restored king. At the same time he employed every means ho could devise to prevent the execution of 3larshal Ney. After the war he settled In Runde, and Introduced many important scrums, both theoretical amid practical, into the military system of that country. In 1855 he received pert:deafen from the Czar to settle in Brussels.
Besides the work already mentioned, General Joielni has published the following: 'Correapendance entre le G6neml Jomini et le Gdoeral Sarrazin cur le Campagne de 1813 ;"Illstoire do Guerres do Fred6ric II.,' 1818; Principes do la Strategio,' 1818; 'Vie politique et militaire de Napoleon,' 1827; ' l'rdcls de l'Art de la Guerre; 1538 ; '&In de is Campegne do ISIS, 1530 ; ' Atlas Militaire, &a, all of which are deemed of groat excellence by military men.