Following his recovery, he joined the Alpine Division and was later decorated for bravery. After the war, he lived in Switzerland and, irregularly, in Paris until 1950, when the law of banishment against the heads of France's former ruling dynasties was repealed. Prince Louis became a successful businessman, with a number of financial interests in Africa. In 1951, the prince sent a memorial wreath bearing the Napoleonic 'N' insignia to the funeral of William, German Crown Prince, son of the deposed Wilhelm II, German Emperor. This was seen as an ironic gesture by royalists at the time, given the fact that it was the German House of Hohenzollern that had defeated and dethroned Louis Napoleon's own imperial house during the Franco-Prussian War in 1870. Following Prince Louis's death in Prangins, Switzerland, he designated his grandson, Prince Jean-Christophe Napoléon, as his successor, bypassing his elder son, Prince Charles Napoléon. Louis married Alix de Foresta (born 4 April 1926), on 16 August 1949 at Linières-Bouton, France. They had four children: