He further became member of the Institute in 1812, examiner at the military school at St Cyr in 1815, leaving examiner at the Ecole Polytechnique in 1816, councillor of the university in 1820, and geometer to the Bureau des Longitudes in succession to P. S.
The cabinet, in which Baron Louis was minister of finance, and Marshal Gouvion Saint Cyr remained minister' of war, was entirely Liberal; and its first act was to suppress the ministry of police, as Decazes held that it was incompatible with the regime of liberty.
However, the regent Orleans in no way molested her, but, on the contrary, visited her at St Cyr and continued her pension of 48,000 livres.
While Massna pursued the Austrians into their own lands at the close of I8o5, Italian forces under Eugene and Gouvion St Cyr (q.v.) held their ground against allied forces landed at Naples.
Disregarding the neutrality of the Germanic System, Napoleon sent a strong French corps to overrun Hanover, while he despatched General Gouvion St Cyr to occupy Taranto and other dominating positions in the south-east of the kingdom of Naples.
Calling up St Cyr, whom he had already warned to remain at Dresden with his command, he decides to fall back towards Erfurt, and go into winter quarters between that place and Magdeburg, pointing out that Dresden was of no use to him as a base and that if he does have a battle, he had much better have St Cyr and his men with him than at Dresden.
It was for them that Racine wrote his Esther and his Athalie, and it was because he managed the affairs of St Cyr well that Michel Chamillart became controller-general of the finances.
Whilst waiting his return Murat was enjoined to skirmish with Kutusov, and the emperor himself worked out a scheme to assume the offensive with his whole army towards St Petersburg, calling in Victor and St Cyr on the way.
He then on the 7th of October drew up a final plan, in which one again recognizes the old commander, and this he immediately proceeded to put into execution, for he was now quite aware of the danger threatening his line of retreat from both Blucher and Schwarzenberg and the North Army; yet only a few hours afterwards the portion of the order relating to St Cyr and Lobau was cancelled and the two were finally left behind at Dresden.