The Communist International, abbreviated as Comintern, also known as the Third International (1919–1943), was an international communist organization initiated in Moscow during March 1919. The International intended to fight "by all available means, including armed force, for the overthrow of the international bourgeoisie and for the creation of an international Soviet republic as a transition stage to the complete abolition of the State."
The Comintern was founded after the 1915 Zimmerwald Conference in which Vladimir Lenin had organized the "Zimmerwald Left" against those who refused to approve any statement explicitly endorsing socialist revolutionary action, and after the 1916 dissolution of the Second International.
The Comintern had seven World Congresses between 1919 and 1935. It also had thirteen "Enlarged Plenums" of its governing Executive Committee, which had much the same function as the somewhat larger and more grandiose Congresses. The Comintern was officially dissolved during 1943.
Read more about Comintern: Organizational History, Comintern and Communist Party of China, Comintern-sponsored International Organisations, World Congresses and Plenums of Comintern