1. Introduction; 2. Prelude to global tax coordination: the league's Princeton mission in the Americas; 3. Creation of the fiscal commission (1943– 1946); 4. Pax Americana, cold war and decolonisation: impact on the UN institutional machinery for fiscal activities and postwar international financial flows; 5. First session of the fiscal commission and aftermath (1947); 6. Related intervening developments (September 1947– November 1948); 7. Second session of the fiscal commission and aftermath (1949); 8. Related intervening developments (January 1949– April 1951); 9. Third session of the fiscal commission and aftermath (1951); 10. Related intervening developments (May 1951– April 1953); 11. The taxation of international air transport and contending with ICAO (1947– 1951); 12. Fourth session of the fiscal commission and aftermath (1953); 13. Dissolution of the fiscal commission and subsequent developments; 14. Conclusion.