events
April 13, 1455
Thirteen Years' War: the beginning of the Battle for Kneiphof.
Thirteen Years' War (1454–1466)
The Thirteen Years' War, also called the War of the Cities, was a conflict fought in 1454–1466 between the Crown of the Kingdom of Poland and the Teutonic Order.
Battle for Kneiphof
The Battle for Kneiphof was the culmination of the struggle for control over the port district of Kaliningrad, Kneiphof, lasting from April 13 to July 14, 1455, during the Thirteen Years' War (1454–1466), ending with a decisive victory for the Teutonic Order.
April 13
April 13 is the 103rd day of the year in the Gregorian calendar; 262 days remain until the end of the year.