The ancient house of Holstein, merged with that of Oldenburg, was elected to the throne of Denmark in 1449. All the Northern kingdoms were at that time elective, but that of Denmark shortly after became hereditary. One of its kings, Christian III, had an affection for his brother Adolphus for which there are few parallels in history. He neither wished to leave him powerless, nor could he dismember his own States. By an extraordinary arrangement he shared with him the duchies of Holstein-Gottorp and Sleswick. The descendants of Adolphus should, in future, rule Holstein in conjunction with the kings of Denmark, so that the two duchies should be common property, and the King could do nothing in Holstein without the sanction of the Duke, and _vice versa_. This extraordinary union, of which there had, however, been a parallel instance a few years previously, was, for more than eighty years, a source of quarrels between the Denmark and Holstein branches of the dynasty, since the kings always made it their policy to oppress the dukes, and the dukes were equally determined on independence. The struggle had cost the last Duke his liberty and his supremacy. He had regained both at the Conference of Altena in 1689, through the mediation of Sweden, Holland and England, the guarantors of the treaty. But as a treaty between princes is often only a temporary makeshift, until the stronger is able to oppress the weaker, the quarrel between the new Danish King and the young Duke began again more violently than ever. While the Duke was at Stockholm, the Danes had already begun hostilities in the district of Holstein, and had made a secret alliance with the King of Sweden himself. Frederic Augustus, Elector of Saxony, whom neither the eloquence and schemes of the Abbé de Polignac, nor the great qualifications of the Prince of Conti, his competitor for the throne, had been able to deprive of election as King of Poland, was a prince still more famed for his courage and chivalrous ideals, than for his incredible physical strength. His court, after that of Louis XII, was second to none in Europe in distinction. There was never a prince more generous or liberal, nor one who gave with so good a grace. He had bought half the votes of the Polish nobility, and gained the other half by force on the approach of a Saxon army. He considered it better to keep a standing army to strengthen himself on the throne; but he wanted a pretext for keeping it in Poland. He had, in fact, planned to send it against the King of Sweden, on the occasion we are now going to relate. Livonia, the most beautiful and fertile province of the North, had once belonged to the Knights of the Teutonic order. The Russians, Poles, and Swedes had since severally disputed their claim to it. Sweden had enjoyed it for nearly one hundred years, and was solemnly confirmed in possession of it by the Peace of Oliva.