From a noble family in Saint Malo, Magon became a garde marine in 1777. His father, the governor of the Mascarene Islands, died in 1778 and left his son his estate of Médine on Mauritius, from which Magon derived his full name. He fought at Ushant in 1778 on the ship of the lineBretagne before participating in the English Channel campaign on the Saint Esprit. Rising to enseigne de vaisseau in 1780, he served in the Antilles, on the Solitaire, in the comte de Guichen's squadron. He fought in three battles against Rodney's fleet off Dominica before serving in de Grasse's squadron on the Caton, fighting at the Chesapeake, St. Kitts and Les Saintes. He was captured and only freed at the end of 1782. In April 1783 he set out for the Indian Ocean on the frigate Surveillante, and spent the next 15 years there. On 1 May 1786 he was promoted to lieutenant de vaisseau and in November 1786 he was put in command of the frigate Amphitrite, with which he recaptured Diego Garcia from the British. On his return he served as second officer of the frigate Driade then of the frigate Pandour, with which ships he served another 18 months in the seas off India and China.
French Revolution
In April 1788, he embarked as second officer of the Dryade, before taking command of the Minerve, then the Cybèle. As an aristocrat he was arrested at Port Louis but quickly released, becoming aide de camp to the comte de Malartic, governor general of the Mascarene Islands. In 1793, he commanded the Prudente in Renaud's frigate division, fighting in the French victory over the British ships of the line and on the Rivière Noire District in October 1794. Promoted to capitaine de vaisseau shortly afterwards, he then became the interim commander of French naval forces in the Indian Ocean until the arrival of contre-amiral Sercey's frigate division. On the Prudente, he served in further campaigns, sometimes alone, sometimes with the rest of the division - his notable battles of that period include the Action of 9 September 1796 between six of the division's frigates and the British ships of the line and, in which the admiral refused to press home the advantage won by the French frigates. In January 1798, he took command of the Vertu and, alongside the Régénérée, then escorted a convoy of two Spanish ships of the line back to Europe. He beat off two attacks by the British frigates and . Arriving back in Europe, he was rewarded for his services by the Spanish, notably with a magnificent suit of armour, before taking his frigates on to Rochefort. On arriving back in Paris he had his property confiscated on being accused of colluding with Malartic in disallowing the French Directory agents Baco de la Chapelle and Burnel from applying the decree of 16 Pluviôse Year II on the abolition of slavery but instead forcibly re-embarking them for France. Admiral Étienne Eustache Bruix won Magon's reappointment and a few months later Magon rose to chef de division. At first employed in Paris in reorganising the navy, then in inspecting mainland France's ports, in 1801 he was put back into active service, at first on the ship of the line Océan, then on the Mont-Blanc, the latter of which was part of the naval force under admiral Villaret for the Saint-Domingue expedition. Put in command of four ships of the line and two frigates and ordered to capture fort Dauphin, Magon did so so quickly and successfully that the expedition's supreme commanderLeclerc immediately promoted him to contre-amiral, stating in his report "This nomination was on the army's unanimous wish, and I do not doubt that the government will confirm it".
First Empire
In 1803, admiral Bruix summoned Magon to Boulogne to command the right wing of the flotilla for Napoleon's planned invasion of the United Kingdom. On 11 December 1803 he was made a member of the Légion-d'Honneur, rising to a commander in it on 14 June 1804. Napoleon ordered the flotilla to carry out an exercise and fleet review in the open sea. Magon considered this dangerous due to bad weather, but Bruix refused to excuse him from it. It proved a disaster as Magon had predicted, with a storm destroying 30 barges. In the months that followed Magon beat off several British attempts to destroy the flotilla. In March 1805, Magon commanded a division at Rochefort that included the ships of the line Algésiras and Achille. He joined Villeneuve in the Antilles and commanded the rearguard in the Battle of Cape Finisterre against admiral Robert Calder's squadron. At Trafalgar the following October, Magon was still on the Algésiras as part of the Spanish admiral Gravina's light squadron, which was attacked by Collingwood's squadron. The crew of the Algésiras was about to board the Tonnant when the Colossus and Bellerophon came to their admiral's aid. Magon was wounded by musket balls twice but remained at his post and led the fighting for five hours before finally being killed by a third such ball just before his vessel was itself boarded and captured.
Images
Geoffroy Dauvergne was commissioned by the Mairie de Saint Servan to paint a portrait of Magon in 1960. Three versions of it exist - one in the Mairie de St Servan, one in the Musée de St Malo and one in a private collection.
