Which war ought in 1866 between the German Confederation was the Battle of Hühnerwasser  the first battle of 
Austro-Prussian War: The Austro-Prussian War or Seven Weeks' War (also known as the Unification War, Prussian–German War, German Civil War, War of 1866, Brothers War, or Fraternal War, and in Germany as the German War) was a war fought in 1866 between the German Confederation under the leadership of the Austrian Empire and its German allies on one side and the Kingdom of Prussia with its German allies on the other, that resulted in Prussian dominance over the German states.
i don't know