The weakened French position triggered the Sixth Coalition. Prussia and the United Kingdom joined Russia in declaring war on France, but Austria stayed out due to relations between the Imperial families. On March 30, Marie Louise was appointed Regent as Napoleon set off for battle in Germany. The regency was only "de jure", as all decisions were still taken by Napoleon and implemented by his most senior officials, including Lebrun, Joseph Bonaparte, Talleyrand and Savary. Marie Louise tried unsuccessfully to get her father to ally with France. Austria too joined the opposition to France. She maintained a correspondence with Napoleon, informing him of increasing demands for peace in Paris and the provinces. Napoleon was decisively defeated in Leipzig on October 19 and returned to Saint Cloud on November 9.