3 Jul 1866Battle of Sadowa:Decisive Prussian victory
11 Jul 1866Italians invade Venetia
20 Jul 1866Austrians defeatItalian fleet
Three weeks into the war, invading Prussian armies crushed the Austrians at Sadowa (Königgrätz). Austria was forced to divert troops from the south to defend Vienna, allowing the Italians to make a second attempt on their front.
Prussia defeats Austria at Sadowa (Königgrätz)in wikipedia
Italians cross the Po, launching renewed invasion of Venetiain wikipedia
Austrians defeat Italian fleet at Lissain wikipedia