Doppet threw himself wholeheartedly into the French Revolution, was elected to the Legislative Assembly and became a Jacobin. Appointed commander of a volunteer battalion, he took part in the French invasion of Savoy in 1792. Rapidly promoted to general officer in 1793, the government appointed him to command the "Army of the Alps" in the Siege of Lyon, the army engaged in the Siege of Toulon and the "Army of the Eastern Pyrenees". In no case did his time in command last long. During the last appointment he became ill and was replaced, though he was later employed as a division commander. The government used him because he was politically safe but it finally became clear that his military talent was almost non-existent. In 1797 he was elected to the Council of Five Hundred and he died two years later.