 He was also an early member, along with future First Lady Eleanor Roosevelt, of the League of Free Nations Association, founded in 1918 and after 1923 known as the Foreign Policy Association, which supported American membership in the League of Nations.As a partner in Sullivan & Cromwell, Dulles expanded upon his late grandfather Foster's expertise, specializing in international finance.He played a major role in designing the Dawes Plan, which reduced German reparations payments and temporarily resolved the reparations issue by having American firms lend money to German states and private companies.