Despite the death of William Pitt in January 1806, Britain and the new Whig administration remained committed to checking the growing power of France. Peace overtures between the two nations early in the new year proved ineffectual due to the still unresolved issues that had led to the breakdown of the Peace of Amiens. One point of contention was the fate of Hanover, a German electorate in personal union with the British monarchy that had been occupied by France since 1803. Dispute over this state would eventually become a "casus belli" for both Britain and Prussia against France. This issue also dragged Sweden into the war, whose forces had been deployed there as part of the effort to liberate Hanover during the war of the previous coalition. The path to war seemed inevitable after French forces ejected the Swedish troops in April 1806.