The Battle of Custoza took place on the 24 June 1866 during the Third Italian War of Independence in the Italian unification process.

The Battle of Trautenau or Battle of Trutnov was fought on 27 June 1866, during the Austro-Prussian War. It was the only battle of the war that ended in an Austrian victory over the Prussians, but at a large cost.

The Battle of Gitschin or Jičín took place during the Austro-Prussian War on 29 June 1866, ending with a Prussian victory over the Austrian forces. There is a memorial there today at Jičín in the Czech Republic.

The Battle of Skalitz was a minor engagement in the Königgratz/Sadowa campaign of the Austro-Prussian War of 1866 in Bohemia on 28 June. Following the Prussian victory at the Battle of Náchod the previous day, the Prussian forces, led by General of the Infantry Steinmetz, advanced on Skalitz and defeated the forces of Archduke Leopold.

The Battle of Náchod on 27 June 1866 was the first major action of the Austro-Prussian War. The advance guard of General Karl Friedrich von Steinmetz's 5th Corps occupied some high ground near Náchod as part of a Prussian advance into Bohemia from Silesia. Elements of the Austrian 6th Corps under General Von Ramming came on the scene and attacked the Prussians but were repulsed. As more Austrians arrived, they were ordered into attacks which proved both costly and unsuccessful. Finally, the badly mauled Austrians retreated from the field. The Prussian infantry enjoyed a technical advantage in having the needle gun, a breech-loading rifle that could be fired and loaded from a prone position. Consequently, the Austrian infantry, which were only equipped with muzzle-loading rifles, suffered a disproportionate number of casualties.

The Battle of Langensalza was fought on 27 June 1866, during the Austro-Prussian War, near Bad Langensalza in what is now modern Germany, between the Kingdom of Hanover and the Kingdom of Prussia. The Hanoverians won the battle but were then surrounded by a larger and reinforced Prussian army. Unable to link up with their Bavarian allies to the south, the Hanoverians surrendered.

The Battle of Podol was a minor engagement in the opening days of the Königgrätz campaign of the Austro-Prussian War in Bohemia on 26 and 27 June 1866. The battle took place in modern-day Svijany between troops of the Prussian First Army and elements of Eduard Clam-Gallas' Austrian I Corps.

The Battle of Hühnerwasser (Kuřívody) was the first battle of the Austro-Prussian War. It was the first engagement in the opening days of the Königgrätz campaign, fought in Bohemia on 26 June 1866. It was fought between troops of the Prussian Elbe army under General Herwarth von Bittenfeld and troops from the Austrian I Corps, led by Leopold Gondrecourt.

The Battle of Münchengrätz or Battle of Mnichovo Hradiště was fought near Mnichovo Hradiště, modern day Czech Republic, on 28 June 1866 during the Austro-Prussian War. It ended in a Prussian victory over the Austrian Empire.

The Battle of Schweinschädel took place during the Austro-Prussian War between Prussia and Austria on 29 June 1866. The IV Army Corps of the Austrian Army under Tassilo Festetics tried to stop the advance of the Prussian 2nd Army under Crown Prince Friedrich, but was defeated by the V Army Corps under General von Steinmetz and had to withdraw.

The Battle of Burkersdorf was fought on 28 June 1866, during the Austro-Prussian War. It featured the Austrian X Corps against the Prussian Guard Corps and ended in a Prussian victory.