Konferenz von San Francisco
In May 1945 he was a member of the French Delegation under General Charles de Gaulle and attended the United Nations Conference on International Organization (UNCIO), a convention of delegates from 50 Allied nations that took place from 25 April 1945 to 26 June 1945 in San Francisco, United States. At this convention, the delegates reviewed and rewrote the Dumbarton Oaks agreements.