German candidates for the throne were disputed between the royal houses of Saxony, Württemberg and Bavaria. Bavaria demanded that their Prince Leopold, the Supreme Commander of the German forces on the Eastern front, become the new monarch. Württemberg's candidate Duke Albrecht was considered suitable for the throne because he belonged to the Catholic line of the house. The Saxon House of Wettin's claim to the Polish throne was based on Frederick Augustus I of Saxony, who was made Duke of Warsaw by Napoleon during the Napoleonic Wars, and also to the election of Augustus II the Strong as the King of Poland and Grand Duke of Lithuania in 1697.