March 1 » The first United States census is authorized.
March 4 » France is divided into 83 départements, cutting across the former provinces in an attempt to dislodge regional loyalties based on ownership of land by the nobility.
July 16 » The District of Columbia is established as the capital of the United States after signature of the Residence Act.
October 22 » Northwest Indian War: Native American forces defeat the United States in the Harmar Campaign.
November 1 » Edmund Burke publishes Reflections on the Revolution in France, in which he predicts that the French Revolution will end in a disaster.
December 31 » Efimeris, the oldest Greek newspaper of which issues have survived till today, is published for the first time.
Day of marriage March 20, 1811
The temperature on March 20, 1811 was about 7.0 °C. Wind direction mainly southwest. Weather type: betrokken mist. 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).
May 5 » Peninsular War: In the Battle of Fuentes de Oñoro, the British-Portuguese Army repels an attempt by the French Army of Portugal to relieve the besieged city of Almeida.
May 14 » Paraguay: Pedro Juan Caballero, Fulgencio Yegros and José Gaspar Rodríguez de Francia start actions to depose the Spanish governor.
June 16 » Survivors of an attack the previous day by Tla-o-qui-aht on board the Pacific Fur Company's ship Tonquin, intentionally detonate a powder magazine on the ship, destroying it and killing about 100attackers.
July 5 » The Venezuelan Declaration of Independence is adopted by a congress of the provinces.
August 3 » First ascent of Jungfrau, third highest summit in the Bernese Alps by brothers Johann Rudolf and Hieronymus Meyer.
November 5 » Salvadoran priest José Matías Delgado, rings the bells of La Merced church in San Salvador, calling for insurrection and launching the 1811 Independence Movement.
Day of death March 8, 1863
The temperature on March 8, 1863 was about 7.8 °C. There was 3 mm of rain. The air pressure was 13 kgf/m2 and came mainly from the west-southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 64%. Source: KNMI
In The Netherlands , there was from February 1, 1862 to February 10, 1866 the cabinet Thorbecke II, with Mr. J.R. Thorbecke (liberaal) as prime minister.
February 17 » A group of citizens of Geneva founded an International Committee for Relief to the Wounded, which later became known as the International Committee of the Red Cross.
February 24 » Arizona is organized as a United States territory.
May 12 » American Civil War: Battle of Raymond: Two divisions of James B. McPherson's XVII Corps turn the left wing of Confederate General John C. Pemberton's defensive line on Fourteen Mile Creek, opening up the interior of Mississippi to the Union Army during the Vicksburg Campaign.
May 18 » American Civil War: The Siege of Vicksburg begins.
June 9 » American Civil War: Battle of Brandy Station, Virginia.
November 16 » American Civil War: Battle of Campbell's Station near Knoxville, Tennessee: Confederate troops unsuccessfully attack Union forces.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P5778.php : accessed December 6, 2025), "Henry Collins Flagg (1790-1863)".
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