In 1789 Kellermann enthusiastically embraced the cause of the Revolution, and in 1791 became general of the army in Alsace. In April 1792 he was made a lieutenant-general, and in August of the same year there came to him the opportunity of his lifetime. He rose to the occasion, and his victory of Valmy over the Prussians, in Goethe's words, "opened a new era in the history of the world".
Transferred to the army on the Moselle, Kellermann was accused by General Custine of neglecting to support his operations on the Rhine; but he was acquitted at the bar of the National Convention in Paris, and placed at the head of the army of the Alps and of Italy, in which position he showed himself a careful commander and excellent administrator.
Shortly afterwards he received instructions to reduce Lyons, then in revolt against the Convention, but shortly after the surrender he was imprisoned in Paris for thirteen months. Once more honourably acquitted, he was reinstated in his command, and did good service in maintaining the south-eastern border against the Austrians until his army was merged into that of General Bonaparte in Italy.
Kellermann was then sixty-two years of age, still physically equal to his work, but the young generals who had come to the front in the previous two years represented the new spirit and the new art of war, and Kellermann's active career came to an end. But the hero of Valmy was never forgotten. When Napoleon came to power Kellermann was named successively senator (1800), honorary marshal of France (1803), and duke of Valmy (1808). He was frequently employed in the administration of the army, the control of the line of communications, and the command of reserve troops, and his long and wide experience made him one of Napoleon's most valuable assistants. In 1814 he voted for the deposition of the emperor and became a peer under the royal government on Louis XVIII. After the "Hundred Days" he sat in the Chamber of Peers and voted with the Liberals. He died at Paris on the 23rd of September 1820.
See J. G. P. de Salve, Fragments historiques sur M. le marechal de Kellermann (Paris, 1807), and De Botidoux, Esquisse de la carrière militaire de F. C. Kellermann, duc de Valmy (Paris, 1817).
Original text from 1911 Encyclopaedia Britannica