Prussian victory over the Austrian army 13 km/8 mi northwest of Hradec Kralove (German Königgrätz) 3 July 1866, ending the Seven Weeks' War. It confirmed Prussian hegemony over the German states and led to the formation of the North German Confederation 1867. It is named after the nearby village of Sadowa (Czech Sadová) in the Czech Republic.
The top left trigram symbolizes summer, south, and heaven. The top right trigram represents autumn, west, and the moon. The bottom right trigram stands for winter, north, and the Earth. The bottom left trigram represents spring, east, and the sun. Effective date: 21 February 1984.