The battles of the Austro-Prussian War (1866)

 were:

• 24 June, Battle of Custoza: Austrian army defeats Italian army;
• 27 June, Battle of Trutnov: Austrians check Prussian advance but with heavy losses
• 27 June, Battle of Langensalza: Hanover's army defeats Prussia's;
• 27 June, Battle of Mnichovo Hradiste: Austrians fight a delaying action as they retreat into Bohemia
• 29 June, Battle of Jicin: Prussians defeat Austrians
• 3 July, Battle of Königgrätz: decisive Prussian victory against Austrians;
• 20 July, Battle of Lissa: the Austrian fleet defeats the Italian one;
• 21 July, Battle of Bezzecca: Giuseppe Garibaldi's "Hunters of the Alps" defeat an Austrian army.
• 22 July, (in last day of war), Battle of Lamac near the Bratislava: Austrians defend Bratislava against Prussian army.

Missed Kaltennordheim 1866 between Bavaria and Prussia

and Dermbach https://de.wikipedia.org/wiki/Gefecht_bei_Dermbach