After Napoleon's downfall in 1815, he continued to serve in the royal French army. In 1817, he accompanied Marshal Marmont as chief of staff in quelling the riots at
Lyon, provoked by the harsh conduct of the local military governor, General
Simon Canuel. Soon after, he was suspended from his military duties for his
liberal beliefs, and was arrested in August 1820 and charged with participation in a military conspiracy. Although he was released for lack of evidence, he was later called as a witness, but refused to disclose a name demanded by the public prosecutor, for which he was fined 500 francs. In 1822, he was charged with aiding the flight of the
four sergeants of La Rochelle, but was acquitted. In 1823 he decided to leave France and went to
Greece, to help the Greeks during their ongoing
War of Independence. His first task was the supervision of the fortifications of
Navarino. Then he travelled to Britain to drum up support among the
Philhellenes. Returning again to Greece, he was appointed head of the small Greek regular army, with which he participated in several battles, most notably the
Siege of the Acropolis of
Athens in 1826. In 1828, he returned to France, only to return to Greece alongside the French
Morea expedition. For his services during the Greek War of Independence, the
Third National Assembly at Troezen declared Fabvier an honorary Greek citizen in 1827, and he was later awarded the Grand Cross of the
Order of the Redeemer by King
Otho I. In 1830, he returned to France and took part in the
July Revolution. Initially chief of staff to General
Étienne Maurice Gérard, on 4 August Fabvier was named military commander of Paris. In 1831, he resigned his commission and retired with the rank
Lieutenant General. Fabvier was made a
peer of France in 1845, and in 1848, he was sent as the French ambassador to
Constantinople, and thereafter to
Denmark. Back in France he was elected to the
National Assembly of France as a representative of
Meurthe. There he sided with the conservative group of the assembly. He retired from public life on
2 December 1851, and died in
Paris four years later. ==References==