Austro-Italian ironclad arms race
Austria's defeat in the Seven Weeks War forced Austria to determine a new set of foreign and domestic policies for the future, as Austria's interests since the days of the Holy Roman Empire had primarily been found in Italy and Germany. The Empire thus reformed itself into the Austria-Hungarian Empire following the adoption of the Austro-Hungarian Compromise of 1867 (German: "Ausgleich"), which re-established the sovereignty of the Kingdom of Hungary and placed Hungarians within the Empire on an equal footing with Austrians. Under the "Ausgleich", Emperor Franz Joseph I would be crowned as King of Hungary, while a separate parliament at Pest with powers to enact laws for the lands of the Holy Crown of Hungary would be established.
Military history of Germany
The War of the Three Henries was fought between 977-978. The war was a short lived rebellion by three German princes, all of which were named Henry, against Emperor Otto II. The three Henries were, Bishop Henry I of Augsburg, Henry the Wrangler, and duke Henry I the Younger. Otto was fighting the rebellion of the three Henries when King Lothair III of France invaded Germany and attacked the imperial capital of Aachen with 20,000 men. Otto was forced to flee to Dortmund were he created an effective response. He then counter-invaded France and laid siege to Paris but was forced to withdraw during the winter months. He then turned to defeating the rebellious princes, which he did by besieging Passau were the rebels had gathered. Otto took Passau and punished the three princes for their insurrection.