Zionism was a uniting cause for the two groups. Ashkenazim joined Zionist organizations and began to spread their ideas to the Georgian Jewish communities. In 1897, the first Zionist organization was established in Tbilisi. On 20 August 1901, the First Congress of Caucasus Zionists was held in Tbilisi. Rabbi David Baazov led Georgian Zionism during the late 19th and early 20th centuries. In 1903, Baazov attended the Sixth Zionist Congress in Basel, Switzerland. In 1918, the All-Jewish Congress in Tbilisi took place and included representatives from every Georgian and Russian Jewish community in the country.