
Charles Mathieu Isidore Decaen (, 13 April 1769 – 9 September 1832) was a French general who served during the
French Revolutionary Wars
The French Revolutionary Wars (french: Guerres de la Révolution française) were a series of sweeping military conflicts lasting from 1792 until 1802 and resulting from the French Revolution. They pitted French First Republic, France against Ki ...
, as Governor General of
Pondicherry and the
Isle de France (now
Mauritius
Mauritius ( ; french: Maurice, link=no ; mfe, label=Mauritian Creole, Moris ), officially the Republic of Mauritius, is an island nation in the Indian Ocean about off the southeast coast of the African continent, east of Madagascar. It incl ...
) and as commander of the Army of Catalonia during the
Napoleonic Wars
The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of Fren ...
.
French Revolution
Decaen, born in
Caen
Caen (, ; nrf, Kaem) is a commune in northwestern France. It is the prefecture of the department of Calvados. The city proper has 105,512 inhabitants (), while its functional urban area has 470,000,[French Navy
The French Navy (french: Marine nationale, lit=National Navy), informally , is the maritime arm of the French Armed Forces and one of the five military service branches of France. It is among the largest and most powerful naval forces in t ...]
before the
French Revolution
The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in November 1799. Many of its ideas are considere ...
. In 1792 Decaen enlisted in the ''Calvados'' battalion. He served under
Kléber in the
siege of Mainz. Promoted to adjudant-general, Decaen served in the uprising of the
Vendée
Vendée (; br, Vande) is a department in the Pays de la Loire region in Western France, on the Atlantic coast. In 2019, it had a population of 685,442. . He fought under the generals
Canclaux,
Dubayet,
Moreau
Moreau may refer to:
People
*Moreau (surname)
Places
*Moreau, New York
*Moreau River (disambiguation)
Music
*An alternate name for the band Cousteau, used for the album ''Nova Scotia'' in the United States for legal reasons
In fiction
*Dr. Mo ...
and Kléber. Promoted to
general of brigade
Brigadier general or Brigade general is a military rank used in many countries. It is the lowest ranking general officer in some countries. The rank is usually above a colonel, and below a major general or divisional general. When appointed to ...
, Decaen was captured in the attack on Frantzenthal. After having given his parole he was exchanged.
In 1796 he served under Moreau in the operations near the Rhine and he distinguished himself in the passage of the river and the
siege of Kehl, for which he was awarded a sword of honor by the
French Directory
The Directory (also called Directorate, ) was the governing five-member committee in the French First Republic from 2 November 1795 until 9 November 1799, when it was overthrown by Napoleon, Napoleon Bonaparte in the Coup of 18 Brumaire and r ...
. In 1800 he captured
Munich
Munich ( ; german: München ; bar, Minga ) is the capital and most populous city of the States of Germany, German state of Bavaria. With a population of 1,558,395 inhabitants as of 31 July 2020, it is the List of cities in Germany by popu ...
and that December he commanded a division in the
Battle of Hohenlinden. In that battle, he reacted "confidently and aggressively"
[Arnold, p 245] in a confusing situation in heavy forest during a snowstorm. His attack defeated the southernmost Austrian column and contributed greatly to the overall French success. For his role at Hohenlinden he was promoted to general of division (
Major-General).
Service to the Empire
In Pondicherry
Possibly singled out for "exile" by
Napoleon Bonaparte
Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader who ...
for his association with Moreau's
Army of the Rhine, Decaen was sent on a difficult mission to the French establishment in
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
in 1802. From 1803 to 1810, he defended the remote
Île Bourbon (Réunion) and
Isle de France (Mauritius) against all the efforts of the
British. Ultimately overwhelmed by superior numbers, he obtained an honorable capitulation. He released
Matthew Flinders
Captain Matthew Flinders (16 March 1774 – 19 July 1814) was a British navigator and cartographer who led the first inshore circumnavigation of mainland Australia, then called New Holland. He is also credited as being the first person to u ...
from house arrest in April 1810, a few months before the
Battle of Grand Port
The Battle of Grand Port was a naval battle between squadrons of frigates from the French Navy and the British Royal Navy. The battle was fought during 20–27 August 1810 over possession of the harbour of Grand Port on Isle de France (now Maur ...
(August) and the capitulation to the British on 3 December of the same year.
Spain and fall of the Empire
Upon his return he was made a count and made the head of the Army of
Catalonia
Catalonia (; ca, Catalunya ; Aranese Occitan: ''Catalonha'' ; es, Cataluña ) is an autonomous community of Spain, designated as a ''nationality'' by its Statute of Autonomy.
Most of the territory (except the Val d'Aran) lies on the north ...
from October 1811 to January 1814, fighting in Spain. From his headquarters in
Barcelona
Barcelona ( , , ) is a city on the coast of northeastern Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second most populous municipality of Spain. With a population of 1.6 million within ci ...
, he reported to Marshal
Louis Gabriel Suchet. He formed the Catalan guides and gained their high regard. At Suchet's request, he sent the troops who raised the
Siege of Tarragona. In 1814, he tried in vain to keep the British out of
Bordeaux
Bordeaux ( , ; Gascon oc, Bordèu ; eu, Bordele; it, Bordò; es, Burdeos) is a port city on the river Garonne in the Gironde department, Southwestern France. It is the capital of the Nouvelle-Aquitaine region, as well as the prefectur ...
. After the first abdication of Napoléon I he recognized
Louis XVIII
Louis XVIII (Louis Stanislas Xavier; 17 November 1755 – 16 September 1824), known as the Desired (), was King of France from 1814 to 1824, except for a brief interruption during the Hundred Days in 1815. He spent twenty-three years in ...
and he was appointed as governor of the 11th military division (Bordeaux). Decaen made an unsuccessful effort to maintain the royal authority in that city after the return of
Napoleon I
Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader who ...
from
Elba in 1815.
After the royal princes had left France, Decaen rejoined the emperor's side and during the
Hundred Days
The Hundred Days (french: les Cent-Jours ), also known as the War of the Seventh Coalition, marked the period between Napoleon's return from eleven months of exile on the island of Elba to Paris on20 March 1815 and the second restoration ...
, he commanded troops in the south of France, for which he was imprisoned for five months after the
Bourbon restoration Bourbon Restoration may refer to:
France under the House of Bourbon:
* Bourbon Restoration in France (1814, after the French revolution and Napoleonic era, until 1830; interrupted by the Hundred Days in 1815)
Spain under the Spanish Bourbons:
* ...
which occurred after
Waterloo
Waterloo most commonly refers to:
* Battle of Waterloo, a battle on 18 June 1815 in which Napoleon met his final defeat
* Waterloo, Belgium, where the battle took place.
Waterloo may also refer to:
Other places
Antarctica
*King George Island (S ...
. After his release he retired to civil life until he was recalled to activity by
Louis-Philippe I
Louis Philippe (6 October 1773 – 26 August 1850) was King of the French from 1830 to 1848, and the penultimate monarch of France.
As Louis Philippe, Duke of Chartres, he distinguished himself commanding troops during the Revolutionary War ...
in 1830. He died two years later.
Honours

* Name inscribed on the
Arc de Triomphe
The Arc de Triomphe de l'Étoile (, , ; ) is one of the most famous monuments in Paris, France, standing at the western end of the Champs-Élysées at the centre of Place Charles de Gaulle, formerly named Place de l'Étoile—the ''étoile'' ...
Footnotes
References
* Arnold, James R. ''Marengo & Hohenlinden.'' Barnsley, South Yorkshire, UK: Pen & Sword, 2005.
* Glover, Michael. ''The Peninsular War 1807-1814.'' London: Penguin, 2001.
Titles
{{DEFAULTSORT:Decaen, Charles Mathieu Isidore
1769 births
1832 deaths
French generals
French commanders of the Napoleonic Wars
French colonial governors and administrators
Governors of French India
Counts of the First French Empire
Military personnel from Caen
French Republican military leaders of the French Revolutionary Wars
Names inscribed under the Arc de Triomphe