The Communist International was established at the Founding Congress held in Moscow in March 1919 . A haphazard affair , which was attended by many sympathetic radicals who had no formal mandate from their home organizations , the Comintern 's structure was perfected and formalized at its 2nd World Congress , held in July and August 1920 . It was this latter and more inclusive gathering , attended by a significant contingent of delegates from the continent of Asia , which authorized the convocation a specialized gathering to rally the various national and anti-colonial movements around the Comintern 's banner
Founding Congress
1st Congress of the Comintern
Congress of the Peoples of the East