With the Allied invasion of Normandy, the Committee moved its headquarters to London, and in August 1944 the Committee moved to Paris, following the liberation of France by Allied forces. In September, Allied forces recognized the Committee as the legitimate, provisional government of France, whereupon the Committee reorganized itself under the presidency of Charles de Gaulle, incorporating representatives of various French political parties such as the Socialists and French Communists. The Committee also began the process of writing a new constitution to found the French Fourth Republic. However, Charles de Gaulle resigned in 1946 over the provisional legislature's refusal to grant more powers to the President and owing to the in-fighting between various political factions and the Communists.