July 14 » Alexander Mackenzie finally completes his journey to the mouth of the great river he hoped would take him to the Pacific, but which turns out to flow into the Arctic Ocean. Later named after him, the Mackenzie is the second-longest river system in North America.
July 27 » The first U.S. federal government agency, the Department of Foreign Affairs, is established (it will be later renamed Department of State).
September 24 » The United States Congress passes the Judiciary Act, creating the office of the Attorney General and federal judiciary system and ordering the composition of the Supreme Court.
September 25 » The United States Congress passes twelve constitutional amendments: the ten known as the Bill of Rights, the (unratified) Congressional Apportionment Amendment, and the Congressional Compensation Amendment.
October 19 » John Jay is sworn in as the first Chief Justice of the United States.
November 21 » North Carolina ratifies the United States Constitution and is admitted as the 12th U.S. state.
When copying data from this family tree, please include a reference to the origin: Gerard Mutter, "Family tree De Duffelt", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-duffelt/I166014.php : accessed March 5, 2026), "Joanna Mechtilda van Dijck (????-1789)".
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