January 7 » A peace treaty is signed between Peshwa Bajirao and Jai Singh II following Maratha victory in the Battle of Bhopal.
April 15 » Serse, an Italian opera by George Frideric Handel receives its premiere performance in London, England.
April 18 » Real Academia de la Historia ("Royal Academy of History") is founded in Madrid.
May 24 » John Wesley is converted, essentially launching the Methodist movement; the day is celebrated annually by Methodists as Aldersgate Day and a church service is generally held on the preceding Sunday.
May 25 » A treaty between Pennsylvania and Maryland ends the Conojocular War with settlement of a boundary dispute and exchange of prisoners.
July 20 » Canadian explorer Pierre Gaultier de Varennes et de La Vérendrye reaches the western shore of Lake Michigan.
Day of marriage September 10, 1781
The temperature on September 10, 1781 was about 18.0 °C. Wind direction mainly north-northeast. Weather type: omtrent helder. Source: KNMI
January 17 » American Revolutionary War: Battle of Cowpens: Continental troops under Brigadier General Daniel Morgan defeat British forces under Lieutenant Colonel Banastre Tarleton at the battle in South Carolina.
February 3 » American Revolutionary War: British forces seize the Dutch-owned Caribbean island Sint Eustatius.
March 1 » The Articles of Confederation goes into effect in the United States.
August 24 » American Revolutionary War: A small force of Pennsylvania militia is ambushed and overwhelmed by an American Indian group, which forces George Rogers Clark to abandon his attempt to attack Detroit.
September 5 » Battle of the Chesapeake in the American Revolutionary War: The British Navy is repelled by the French Navy, contributing to the British surrender at Yorktown.
September 6 » The Battle of Groton Heights takes place, resulting in a British victory.
Day of death September 28, 1784
The temperature on September 28, 1784 was about 14.0 °C. There was 88 mm of rainWind direction mainly west-northwest. Weather type: zeer betrokken. Source: KNMI
January 14 » American Revolutionary War: Ratification Day, United States - Congress ratifies the Treaty of Paris with Great Britain.
March 22 » The Emerald Buddha is moved with great ceremony to its current location in Wat Phra Kaew, Thailand.
April 9 » The Treaty of Paris, ratified by the United States Congress on January 14, 1784, is ratified by King George III of the Kingdom of Great Britain, ending the American Revolutionary War. Copies of the ratified documents are exchanged on May 12, 1784.
August 17 » Classical composer Luigi Boccherini receives a pay rise of 12000 reals from his employer, the Infante Luis, Count of Chinchón.
August 23 » Western North Carolina (now eastern Tennessee) declares itself an independent state under the name of Franklin; it is not accepted into the United States, and only lasts for four years.
October 22 » Russia founds a colony on Kodiak Island, Alaska.
When copying data from this family tree, please include a reference to the origin: G.J. Speckmann, "Family tree Speckmann", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-speckmann/I182.php : accessed February 22, 2026), "Johann Berend Vahlenkamp (1738-1784)".
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