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He appointed on the rank of "général de brigede" on June 22, 1794.He participated in the invasion of southwestern Germany and Switzerland with the Army of the Danube in 1799, in which he was assigned to the Artillery Park, under command of Jean Ambroise Baston de Lariboisière.
In 1812, Langeron was given command of a corps in the Army of the Danube with which he fought at Brest-Litovsk and on the Berezina.