Jean-Robert Argand introduced the term " module " ' unit of measure ' in French in 1806 specifically for the complex absolute value and it was borrowed into English in 1866 as the Latin equivalent " modulus ".

The term " absolute value " has been used in this sense since at least 1806 in French and 1857 in English.

* 1723 – Mathurin Jacques Brisson, French naturalist ( d. 1806 )

In 1806, the French chemists Louis-Nicolas Vauquelin and Pierre Jean Robiquet isolated a compound in asparagus that was subsequently named asparagine, the first amino acid to be discovered.

The monument was designed by Jean Chalgrin in 1806, and its iconographic program pitted heroically nude French youths against bearded Germanic warriors in chain mail.

* 1727 – Michel Adanson, French botanist ( d. 1806 )

Clausewitz served in the Rhine Campaigns ( 1793 – 1794 ) including the Siege of Mainz, when the Prussian army invaded France during the French Revolution, and served in the Napoleonic Wars from 1806 to 1815.

* 1806 – Battles of Pultusk and Golymin: Russian forces hold French forces under Napoleon.

In the Capitulation of Erfurt the city, its 12, 000 defenders, and the Petersberg fortress were handed over to the French on 16 October 1806.

The city became part of the First French Empire in 1806 as Principality of Erfurt, and was returned to Prussia in 1815 after the Napoleonic Wars.

* 1806 – Battle of San Domingo: British naval victory against the French in the Caribbean.

The Confederation of the Rhine, a confederation of client states of the First French Empire, existed from 1806 to 1813.

A pro-French Batavian Republic was established ( 1795 – 1806 ), and with the consolidation of French power under Napoleon gradually turned into a French satellite state, culminating in the Kingdom of Holland ( 1806 – 1810 ) and later simply an imperial province.

; 2nd ed., 1806 ), which was translated into French and served as a model for Wilhelm Adolf Becker's Gallus and Charicles.

* 1806 – Catherine Labouré, French visionary and saint ( d. 1876 )

Mai 1806. jpg | In this 1806 French print, the woman with the Menorah represents the Jews being emancipated by Napoleon Bonaparte

In the course of the Napoleonic Wars, the fortress surrendered to French troops in 1806.

* 1806 – The French Army enters Berlin.

* 1806 – Believing he was facing a much larger force, Prussian Lieutenant General Friedrich von Romberg, commanding 5, 300 men, surrendered the city of Stettin to 800 French soldiers commanded by General Lassalle.

Much of Clausewitz's thinking was based on his experience as a Prussian war planner concerned with how to use popular forces in an insurrectionary struggle against the much-superior French forces which occupied Prussia after 1806 — how, in short, to wage a " Spanish War in Germany.

* 1806 – Christophe Léon Louis Juchault de Lamoricière, French general ( d. 1865 )

In 1806 Francis II ( now Francis I of Austria ) named the Archduke Charles, already a field marshal, as Commander in Chief of the Austrian army and Head of the Council of War.

At the Battle of Jena-Auerstedt on October 14, 1806 – when Napoleon invaded Prussia and defeated the massed Prussian-Saxon army commanded by Karl Wilhelm Ferdinand, Duke of Brunswick – he was captured, one of the 25, 000 prisoners captured that day as the Prussian army disintegrated.

He wished to maintain his and his family's Imperial status in the event that the Holy Roman Empire should be dissolved, as it indeed was in 1806 when an Austrian-led army suffered a humiliating defeat at the Battle of Austerlitz.

The disaster at Jena in 1806, in which Napoleon completely crushed the Prussian army, drove him to Königsberg for a time, but he returned to Berlin in 1807 and continued his literary activity.

Largely outnumbered, the Prussian army was crushed at Jena-Auerstedt in 1806 ; Napoleon captured Berlin and went as far as Eastern Prussia.

John Graves Simcoe ( February 25, 1752 – October 26, 1806 ) was a British army officer and the first Lieutenant Governor of Upper Canada from 1791 – 1796.

In 1806 and 1807, the British army attempted to seize Buenos Aires and Montevideo as part of the Napoleonic Wars.

As a reward for his services at Austerlitz ( 2 December 1805 ) he became the 1st Sovereign Prince of Ponte Corvo ( 5 June 1806 ), but during the campaign against Prussia, in the same year, was severely reproached by Napoleon for not participating with his army corps in the battles of Jena and Auerstädt, though close at hand.

In 1806 shortly after the death of Christie and her husband she married Edward Butler, another army officer.

Napoleon himself defeated a Prussian army at Jena ( 14 October 1806 ), and Davout defeated another at Auerstädt on the same day.

When in the war against Prussia ( 1806 – 7 ) the emperor invaded Poland and the Jews rendered great services to his army, he remarked, laughing, " The sanhedrin is at least useful to me.

On 14 October 1806, Napoleon fought and defeated the Prussian army here in the Battle of Jena-Auerstedt.

His father, Johann Christoph Droysen, was an army chaplain who had been present at the celebrated siege of Kolberg in 1806 – 1807.

The reason for perpetrating this royally sanctioned coup d ' état was that the estates, despite a royal prohibition, had taken to the courts to appeal against royal statutes, specifically the statute of 30 April 1806 regarding the raising of a Pomeranian army.

In 1804 through the influence of Prince Adam Czartoryski he entered the Russian diplomatic service, and was employed in 1805 as Russian commissioner with the Anglo-Neapolitan, and in 1806 with the Prussian army.

The town was founded on 17 August 1806 on the location of a French army camp.

In 1803 he was appointed to the command of an army corps in Italy, in 1805 he served with distinction under Masséna, and in 1806 was engaged in the campaign in southern Italy.

The Greater Poland Uprising is one of the two most successful Polish uprisings: the other was the Great Poland Uprising of 1806 which was ended by the entry of Napoleon's army.

After the defeat of the Prussian army at Jena in 1806, Charlottenburg was occupied by the French.

In the mobilizations and precautionary measures that marked the years 1804 and 1805, and in the war of 1806 that ensued, Scharnhorst served as chief of the general staff ( lieutenant-quartermaster ) of the Duke of Brunswick, received a slight wound at Auerstedt ( 14 October 1806 ) and distinguished himself by his stern resolution during the retreat of the Prussian army.