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

* 1806 – Francis II, the last Holy Roman Emperor, abdicates ending the Holy Roman Empire.

* 1806 – Battle of Mišar during the Serbian Revolution begins.

* 1806 – Santiago de Liniers, 1st Count of Buenos Aires re-takes the city of Buenos Aires, Argentina after the first British invasion.

* 1724 – George Stubbs, English painter ( d. 1806 )

* Anton Alexander Graf von Auersperg ( 1806 – 1876 ) – Austrian poet who wrote under the pseudonym of Anastasius Grün.

The Lewis and Clark Expedition spent the winter of 1805 – 1806 at Fort Clatsop, a small log structure south and west of modern day Astoria.

* 1806 – Michael Haydn, Austrian composer ( b. 1737 )

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

* William Bernard Ullathorne ( 1806 – 89 )

Following his conquest of most of Western Europe, the first Napoleon made his elder brother Joseph ( 1768 – 1844 ) king first of Naples ( 1806 – 1808 ) and then of Spain ( 1808 – 1813 ), his third brother Louis ( 1778 – 1846 ) king of Holland ( 1806 – 1810 ) ( subsequently forcing his abdication after his failure to subordinate Dutch interests to those of France ) and his youngest brother Jérôme Bonaparte ( 1784 – 1860 ) king of Westphalia, the short-lived realm created from some of the states of northwestern Germany ( 1807 – 1813 ).

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

The defeat of the British invasions of the Río de la Plata in South America ( 1806 and 1807 ) emboldened an independent attitude in Spain's American colonies.

British Governor Raffles, who the later founded the city of Singapore, ruled the colony the following 10 years of the British interregnum ( 1806 – 1816 ).

* 1806 – The Vellore Mutiny is the first instance of a mutiny by Indian sepoys against the British East India Company.

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.

When Monroe and the British signed a renewal in December 1806, Jefferson decided to reject it, and not submit it to the Senate.

* 1806 – Cape Colony becomes a British colony.

* 1806 – Dutch settlers in Cape Town surrender to the British.

* 1806 – Elizabeth Barrett Browning, British poet ( d. 1861 )

* 1806 – Napoleonic Wars: Forces of the British Empire lay siege to the port of Boulogne in France by using Congreve rockets, invented by Sir William Congreve.

When British troops attempted to seize Buenos Aires in 1806, the attack was repulsed by the city's residents, not by Spain.

In 1806, the Leeward Islands Caribee government was split into two groups, with Antigua, Barbuda, Redonda and Montserrat in one group, and St. Kitts, Nevis, Anguilla and the British Virgin Islands in the other.

Thomas Hare ( born in England, 28 March 1806 ; died 6 May 1891 ) was a British proponent of electoral reform.

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

In 1806 and 1807, the British ( enemies of Spain in the Napoleonic Wars ) launched the British invasions of the Río de la Plata.

* September 15 – Isambard Kingdom Brunel, British engineer ( b. 1806 )

* May 8 – John Stuart Mill, British philosopher ( b. 1806 )

During the Napoleonic Wars, a British military expedition landed in the Cape Colony and defeated the defending Dutch forces at the Battle of Blaauwberg ( 1806 ).

With the 1886 discovery of gold in the Transvaal, the resulting gold rush brought thousands of British and other prospectors and settlers from across the globe and over the border from the Cape Colony ( under British control since 1806 ).

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

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.

In the Greater Poland Uprising of 1806, Polish soldiers and civilian volunteers assisted the efforts of Napoleon by driving out Prussian forces from the region.

Buenos Aires was invaded in 1806, and then liberated by forces from Montevideo led by Santiago de Liniers.

After defeating Prussian forces at Battle of Jena-Auerstedt | Jena, the French Army entered Berlin on 27 October 1806

Between 1806 and 1807, British military forces tried to invade the area of the Rio de la Plata, at the command of Home Riggs Popham and William Carr Beresford, and John Whitelocke.

French appeared in Gniezno in November 1806, and following general Jan Henryk Dabrowski's order issued to all town and cities and country property owners to provide recruits for the organizing Polish forces, Gniezno initially provided 60 recruits who participated in the battles of 1806-07.

After defeating Prussian forces at Battle of Jena-Auerstedt | Jena, the French Army entered Berlin on 27 October 1806

Dutch expansion paused for several years during an interregnum of British rule between 1806 and 1816, when the Dutch Republic was occupied by the French forces of Napoleon.

In 1806, the Mamluks defeated the Turkish forces several times, and in June the rival parties concluded a peace treaty by which Muhammad Ali, who had been appointed as governor of Egypt on 26 March 1806, was to be removed and the state authority in Egypt returned to the Mamluks.

The Battle of Halle was fought between French and Prussian forces on 17 October 1806.

Moore took command of the British forces in the Iberian peninsula following the recall of Harry Burrard of Lymington ( 1 June 1755 – 17 October 1813 ), Hew Dalrymple ( 1750 – 1830 ), Governor of Gibraltar from November 1806 to August 1808, and Arthur Wellesley ( 1769 – 1852 ), later Duke of Wellington, who all faced an inquiry over the Convention of Cintra on the French troops ' evacuation from Portugal.

The twin battles of Jena and Auerstedt ( older name: Auerstädt ) were fought on 14 October 1806 on the plateau west of the river Saale in today's Germany, between the forces of Napoleon I of France and Frederick William III of Prussia.

Glogau was captured by French forces after the Battle of Jena in 1806.

Prussian troops began mobilizing, culminating in the October 1806 Battle of Jena-Auerstedt, which was a disaster for Prussia, as the ability of its armed forces to continue the war were effectively wiped out.

Following French Emperor Napoleon I's victory at the Battle of Jena and the ensuing evacuation by Prussia of her Polish provinces, in November 1806 Poniatowski was asked by the Prussian king Frederick William III to assume the governorship of Warsaw, to which he agreed ; he also assumed the command of the city's municipal guard and citizen militia forces organized by local residents.

Following the decision by King Ferdinand to side with the Third Coalition against Napoleon I of France, French forces had invaded the Kingdom of Naples in the spring of 1806, after the British army supposedly defending the kingdom evacuated Italy altogether.

The first time the yellow, blue and red flag was flown by Miranda was in 1806 on the ship Leander when trying to face the Spanish forces off of the coast of Haiti.

Buenos Aires was captured in 1806, and then liberated by Santiago de Liniers with forces from Montevideo.

Janssens had previously served as Governor General of the Cape Colony, and had been forced to capitulate after being defeated by British forces at the Battle of Blaauwberg in 1806.