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."
Seven Years' War
Between 10 and 17 October 1757, a Hungarian general, Count András Hadik, serving in the Austrian army, executed what may be the most famous hussar action in history. When the Prussian king, Frederick, was marching south with his powerful armies, the Hungarian general unexpectedly swung his force of 5,000, mostly hussars, around the Prussians and occupied part of their capital, Berlin, for one night. The city was spared for a negotiated ransom of 200,000 thalers. When Frederick heard about this humiliating occupation, he immediately sent a larger force to free the city. Hadik, however, left the city with his hussars and safely reached the Austrian lines. Subsequently, Hadik was promoted to the rank of marshal in the Austrian Army.