On 5 April 1944, Bonnet left France for Switzerland, where he was to stay until March 1950. After the war, proceedings were begun against him but eventually dropped, but he was expelled from the Radical Party in 1944. During his time in exile, Bonnet was to write a five-volume set of memoirs. Bonnet throughout his career had been very much concerned with his reputation, and during his time as Foreign Minister had a team of journalists to engage in what is known in France as "Bonnetiste" writing, namely a series of books and pamphlets meant to glorify Bonnet as the defender of the peace and Europe's savior.