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."
Friedrich Heinrich von Seckendorff
Following the death of Charles VII, Seckendorff negotiated a reconciliation between Austria and Bavaria in the Treaty of Füssen on 22 April 1745. Emperor Francis I reaffirmed all of Seckendorff's honors, and the diplomat retired to his estate at Meuselwitz in Thuringia. In 1757 the death of his wife, for whom, harsh and unamiable as he was, he had a deep and abiding affection, broke down his already failing health. Frederick the Great directed Prussian hussars to abduct Seckendorff from Meuselwitz in December 1758 during the Seven Years' War. After spending half a year in detention in Magdeburg, he was exchanged for Moritz of Anhalt-Dessau, who had been captured by Austrians at Hochkirch. Returning to Meuselwitz, Seckendorff died at his estate in 1763.