He was the primary figure behind the Franco-Soviet Treaty of Mutual Assistance of 1935, though it was signed by his successor, Pierre Laval.
Ia merupakan tokoh penting di balik Perjanjian Bantuan Timbal Balik Prancis-Soviet pada tahun 1935, walaupun perjanjian ini ditandatangani oleh penerusnya, Pierre Laval.