Youth up to the Revolution

Of aristocratic origins, and the son of a chef d'escadre, Laurent de Truguet entered the gardes de la marine in 1765. He navigated successively the Hirondelle, Provence, Atalante, Pléiade and Chimère. He won several prizes, awarded to the best gardes by Louis XV. He became enseigne de vaisseau in 1773 and had already been in eight campaigns by July 1778, when war was declared against England.

In the war in America, he served on the frigate Atalante then on the vessel Hector under the comte d'Estaing, and took part in the battle at Saint Lucia. Lieutenant de vaisseau from 1779, in the land attack on Savannah, he saved the life of admiral d'Estaing despite being severely wounded himself, for which he was made a knight of Order of Saint Louis.

On the Languedoc then the Citoyen, he took part in various battles as a member of Guichen's then de Grasse's fleet (battle of Chesapeake, Battle of St. Kitts, Battle of the Saintes).

Major de Vaisseau from 1784, he cooperated in the tasks assigned to M. Choiseuil-Gouffier, ambassador to Constantinople, and was charged with instructing the Ottomans in the arts of fortification, artillery, metallurgy, naval architecture, and so on. Truguet commanded a brig, the Tarleton, with which he re-mapped the hydrography of the Dardanelles in 1785 and 1786, and in 1787 published a "Traité de Marine" (Naval Treatise) at Constantinople.

French Revolutionary Wars

On his return to France in 1789, he was sent to Brest in 1790 to take the command of a frigate there intended for a mission that was, in the end, rendered unnecessary by the course of events. He then made a trip in England for there to complete his naval education. Made capitaine de vaisseau on 1 January 1792, he was promoted as early as the following July to the rank of rear admiral, commanding the French naval forces in the Mediterranean from his flagship Tonnant (1798). He bombarded Nice, Villefranche and Oneglia, while general Montesquiou seized the Duchy of Savoy. That same year he and his fleet were instructed to cooperate in the Expédition de Sardaigne, a failed invasion of the island of Sardinia; he had moved to bombard Cagliari, when an insurrection broke out among the disembarking troops which obliged him to sail to the beaches and reembark them.

Passing Corsica, he was received by the Bonaparte family and began a romance with Elisa, sister of the future Emperor and the close relations with the family which he would retain to his death. On his return to Toulon in March 1793, he went to Paris, where he got the government to adopt a maritime penal code, that would prevent many future insurrections and mutinies but still provoke much discontent in France's naval bases. He was discharged at the end of 31 May that year and imprisoned at the time of the publication of the law of suspects, but was liberated on 9 Thermidor (27 July).

He was promoted vice admiral in 1795 and minister of the Navy by the French Directory from November 1795 to July 1797. During his two years in this ministry, he reestablished discipline and order in France's harbours and arsenals, recalling former officers discharged due to the Revolution. Under pressure from general Hoche, he presented a plan for the 1796 French invasion of Ireland to the Directory, with Morard de Galle commanding the naval forces. This operation proved to be a complete fiasco. He organized and sent a division of frigates into the Indian Ocean under the command of Sercey.

He strove to get the colonies to respect the 1794 decree of the abolition of the slavery, and supported the creation of a collège intended for black and mixed-race children close to Paris; this collège later had the sons of Toussaint Louverture among its pupils, but was closed by Decrès in 1802.

Truguet also took the initiative in composing a new collection of naval tactics that would be adopted in year V of the French Republican Calendar. He broke with the exclusively defensive conceptions of the collection of 1769. He officialised and systematised the practice of having a light attack squadron within each fleet. This collection was later completed by the collection of year IX, also inspired by Truguet.

At the time of the ministerial reshuffle in preparation for the coup of 18 Fructidor year V (4 September 1797), he was replaced by Georges-René Pléville De Pelley, but was instead made France's ambassador to Spain. He was removed from the political scene under the pretext of not having returned to France fast enough at the end of his duties, though in fact this removal was down to Talleyrand, the minister of the foreign affairs, in revenge for Truguet opposing Talleyrand's embezzlements in Spain. Exiled to Holland, he remained there nine months. On his return from Egypt, Napoléon Bonaparte offered him the navy ministry again, but Truguet refused this, and was instead named conseiller d'État on 20 September 1801.

He composed four reports for the First Consul, proposing a reorganization of the navy and taking a strong position and courageous stand against the re-legalisation of slavery – Truguet's solid republican convictions made him consider equality as a fundamental right. He was probably the only official to dare oppose Bonaparte on this point, and was violently attacked and mocked by those favoring a return to the old order in the colonies and strongly reprimanded by the First Consul. Nevertheless, in 1802 he was given command of the combined force gathered at Cadiz, with the eminent title of amiral en chef. The squadrons of Linois, Gantheaume and Bedout had to gather at Truguet's HQ. The peace of Amiens brought the admiral back to Paris.

First French Empire

When war broke out again, Bonaparte entrusted to Truguet the organisation and command of the fleet at Brest, with his flagship being the Alexandre, then the Vengeur. In 1804, while all were conscientiously signing a "spontaneous" petition amidst his whole fleet to demand an imperial crown for Bonaparte, in the same way as was being done in the army, Truguet publicly took a stand against the establishment of the Empire in a letter that became historic. This consigned him to 5 years of severe disgrace, and the loss of all his titles and his membership of the légion d'honneur.

In 1809, the Emperor recalled him to command the squadron gathered at Rochefort, after the disastrous attack by English fireships in the raid on the île d'Aix. The following year, Napoleon put him at the head of the Kingdom of Holland's naval high command. Repulsed by foreign invasion, Truguet was one of the first to leave his post in the last years of the Empire.

Bourbon Restoration

Admiral Truguet returned to Paris where Louis XVIII brought him back into the navy at the head of the naval corps, and made him a knight grand-cross of the Légion d'honneur. During the Hundred Days, he received neither a command nor any favours from Napoleon. On the second restoration, he was given overall command of the Brest fleet, and received orders to keep the town's arsenal safe from the approaching foreign occupation troops. Succeeding in doing so, he was rewarded by the King by being made knight grand-cross of the order of Saint Louis, a comte, and a peer of France (5 May 1819).

At the end of the July Revolution, Truguet was elevated to the highest naval honour, that of Grand Amiral, naval equivalent to Marshal of France. He died aged 87 in 1839 in Toulon.