Held in Carlsbad, Czechoslovakia, this is the first congress convened after WWI, and after the issuance of the November 1917 Balfour Declaration. Ratification of the British Mandate for Palestine aimed at guiding the establishment of the Jewish national home is welcomed by the Congress. Chaim Weizmann, elected president of WZO, replacing Warburg, takes part in discussions about issues of Zionist-Arab relations after the Arab riots in Palestine in 1920. The Congress likewise briefs on the activities of Keren HaYesod, the financial arm of the WZO, which had been established a year earlier in London.