June 4 » Battle of Hohenfriedberg: Frederick the Great's Prussian army decisively defeated an Austrian army under Prince Charles Alexander of Lorraine during the War of the Austrian Succession.
June 28 » A New England colonial army captures the French fortifications at Louisbourg (New Style).
July 9 » French victory in the Battle of Melle allows them to capture Ghent in the days after.
August 19 » Ottoman–Persian War: In the Battle of Kars, the Ottoman army is routed by Persian forces led by Nader Shah.
August 19 » Prince Charles Edward Stuart raises his standard in Glenfinnan: The start of the Second Jacobite Rebellion, known as "the 45".
September 21 » A Hanoverian army is defeated, in ten minutes, by the Jacobite forces of Prince Charles Edward Stuart
Day of death September 9, 1818
The temperature on September 9, 1818 was about 13.0 °C. Wind direction mainly southwest. Weather type: half bewolkt regen. Source: KNMI
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De Republiek der Verenigde Nederlanden werd in 1794-1795 door de Fransen veroverd onder leiding van bevelhebber Charles Pichegru (geholpen door de Nederlander Herman Willem Daendels); de verovering werd vergemakkelijkt door het dichtvriezen van de Waterlinie; Willem V moest op 18 januari 1795 uitwijken naar Engeland (en van daaruit in 1801 naar Duitsland); de patriotten namen de macht over van de aristocratische regenten en proclameerden de Bataafsche Republiek; op 16 mei 1795 werd het Haags Verdrag gesloten, waarmee ons land een vazalstaat werd van Frankrijk; in 3.1796 kwam er een Nationale Vergadering; in 1798 pleegde Daendels een staatsgreep, die de unitarissen aan de macht bracht; er kwam een nieuwe grondwet, die een Vertegenwoordigend Lichaam (met een Eerste en Tweede Kamer) instelde en als regering een Directoire; in 1799 sloeg Daendels bij Castricum een Brits-Russische invasie af; in 1801 kwam er een nieuwe grondwet; bij de Vrede van Amiens (1802) kreeg ons land van Engeland zijn koloniën terug (behalve Ceylon); na de grondwetswijziging van 1805 kwam er een raadpensionaris als eenhoofdig gezag, namelijk Rutger Jan Schimmelpenninck (van 31 oktober 1761 tot 25 maart 1825).
January 2 » The British Institution of Civil Engineers is founded by a group of six engineers; Thomas Telford would later become its first president.
February 5 » Jean-Baptiste Bernadotte ascends to the thrones of Sweden and Norway.
March 30 » Physicist Augustin Fresnel reads a memoir on optical rotation to the French Academy of Sciences, reporting that when polarized light is "depolarized" by a Fresnel rhomb, its properties are preserved in any subsequent passage through an optically-rotating crystal or liquid.
April 4 » The United States Congress, affirming the Second Continental Congress, adopts the flag of the United States with 13 red and white stripes and one star for each state (20 at that time).
July 29 » French physicist Augustin Fresnel submits his prizewinning "Memoir on the Diffraction of Light", precisely accounting for the limited extent to which light spreads into shadows, and thereby demolishing the oldest objection to the wave theory of light.
October 20 » The Convention of 1818 is signed between the United States and the United Kingdom, which settles the Canada–United States border on the 49th parallel for most of its length.
When copying data from this family tree, please include a reference to the origin: R Miller, "Flowers tree", database, Genealogy Online (https://www.genealogieonline.nl/flowers-tree/P1154.php : accessed January 26, 2026), "William (Wilhelm) Lenhart (1745-1818)".
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