January 8 » The papal bull Romanus Pontifex awards the Kingdom of Portugal exclusive trade and colonization rights to all of Africa south of Cape Bojador.
February 4 » In the Thirteen Years' War, the Secret Council of the Prussian Confederation sends a formal act of disobedience to the Grand Master.
March 6 » Thirteen Years' War: Delegates of the Prussian Confederation pledge allegiance to King Casimir IV of Poland who agrees to commit his forces in aiding the Confederation's struggle for independence from the Teutonic Knights.
April 9 » The Treaty of Lodi is signed, establishing a balance of power among northern Italian city-states for almost 50 years.
September 18 » Thirteen Years' War: In the Battle of Chojnice, the Polish army is defeated by the Teutonic knights.
When copying data from this family tree, please include a reference to the origin: June Mcmurphy, "Riches to Rags Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/riches-to-rags-family-tree/P8097.php : accessed April 30, 2025), "Elizabeth Grey (1413-1454)".
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