April 20 » American Revolutionary War: The Siege of Boston begins, following the battles at Lexington and Concord.
May 10 » American Revolutionary War: A small Colonial militia led by Ethan Allen and Colonel Benedict Arnold captures Fort Ticonderoga.
July 5 » The Second Continental Congress adopts the Olive Branch Petition.
July 26 » The office that would later become the United States Post Office Department is established by the Second Continental Congress. Benjamin Franklin of Pennsylvania takes office as Postmaster General.
September 11 » Benedict Arnold's expedition to Quebec leaves Cambridge, Massachusetts.
October 13 » The Continental Congress establishes the Continental Navy (predecessor of the United States Navy).
When copying data from this family tree, please include a reference to the origin: Alfred Groot, "Family tree Groot", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-groot/I1663.php : accessed December 25, 2025), "Jan Hendriks Pomper".
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