International Committee of the Red Cross additional protocol to the Geneva Convention was adopted in 1925 which outlawed the use of suffocating or poisonous gases and biological agents as weapons. Four years later, the original Convention was revised and the second Geneva Convention "relative to the Treatment of Prisoners of War" was established. The events of World War I and the respective activities of the ICRC significantly increased the reputation and authority of the Committee among the international community and led to an extension of its competencies. As early as in 1934, a draft proposal for an additional convention for the protection of the civil population
Thai Red Cross Society Plien acted as the society secretary. The society's name was later changed to the Siam Red Cross Society and, following the renaming of the country, the Thai Red Cross Society. The society was officially recognized by the International Committee of the Red Cross on 27 May 1920, and membership in the International Federation of Red Cross and Red Crescent Societies (then the League of Red Cross Societies) was granted on 8 April 1921. Following the statutes of the International Red Cross and Red Crescent Movement, the Thai Red Cross Society provides humanitarian aid and relief services in times of war