Mar 6th
– 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.
Mar 9th
Mar 22nd
– The Treaty of Lodi is signed, establishing a balance of power among northern Italian city-states for almost 50 years.
Nov 25th