Austro-Prussian War
The pretext for the conflict was found in the dispute between Prussia and Austria over the administration of Schleswig-Holstein, which the two of them had conquered from Denmark and agreed to jointly occupy at the end of the Second Schleswig War in 1864. When Austria brought the dispute before the German Diet and also decided to convene the Diet of Holstein, Prussia declared that the Gastein Convention had thereby been nullified and invaded Holstein. When the German Diet responded by voting for a partial mobilization against Prussia, Bismarck claimed that the German Confederation was ended. Crown Prince Frederick "was the only member of the Prussian Crown Council to uphold the rights of the Duke of Augustenburg and oppose the idea of a war with Austria which he described as "fratricide"". Although he supported unification and the restoration of the medieval empire, "Fritz could not accept that war was the right way to unite Germany."
History of Germany
In the War of Austrian Succession (1740–1748) Maria Theresa fought successfully for recognition of her succession to the throne. But in the Silesian Wars and in the Seven Years' War she had to cede 95% of Silesia to Frederick the Great. After the Peace of Hubertsburg in 1763 between Austria, Prussia and Saxony, Prussia won recognition as a great power, thus launching a century-long rivalry with Austria for the leadership of the German peoples.