The Austro-Prussian War or Seven Weeks' War was a war fought in 1866 between the Austrian Empire and the Kingdom of Prussia, with each also being aided by various allies within the German Confederation.
More:
https://en.wikipedia.org/wiki/Austro-Prussian_War Medal #1 Battle of Königgrätz July 3, 1866 Prussian Medal
Medal #2 Battle of Langensalza 1866 Hanoverian Medal



