(ProQuest: ... denotes non-USASCII text omitted.)Nowadays, especially after the end of the Cold War, communism has lost its appeal as revolutionary thought. Although there are several communist regimes still in existence, nobody except the most committed communists imagines that a communist revolution is possible or historically inevitable. But in the 1920s and 1930s, communism was one of the major political ideologies that inspired revolutionary movements all over the world. The success of the Russian Revolution in 1917 was so impressive that those who were inspired by this first successful communist revolution tried to create their own revolutions in their countries.In East and Southeast Asia, communism was received with enthusiasm by young intellectuals who wanted to liberate their countries from colonial rule or tried to solve social and economical inequalities by way of communist revolutions. They taught communism to laborers and peasants at night schools or by distributing leaflets, and mobilized them to go on strikes and demonstrations. They organized labor unions, peasant associations, and communist institutions. The first communist party in East and Southeast Asia was the Communist Association of the Indies, which was established in the Dutch East Indies in 1920 (and renamed the Communist Party of Indonesia in 1924). The next year the Chinese Communist Party was established, followed in 1922 by the Japanese Communist Party. In 1930, four communist parties were established in Southeast Asia: the Indochinese Communist Party, the Siamese Communist Party, the Malayan Communist Party, and the Philippine Communist Party.Local communist movements in East and Southeast Asia were led by these communist parties, labor unions, and peasant associations, but there was another important dimension to the communist movements in the 1920s and 1930s. The local parties were linked in a network of international and/or regional communist movements under the aegis of the Third International (Comintern). Moreover, local communists frequently sought to promote communism regionally or to help neighboring movements. While there are a number of studies on country-based communist movements, studies of the international or regional communist movement in East and Southeast Asia in the 1920s and 1930s are not as well done, except for several pioneering works on such topics as the regional and international liaisons of the Malayan Communist Party (Cheah 1992; Hara 2009), those of the Indochinese Communist Party (Goscha 1999; Kurihara 2005), and the Comintern's activities in Asia (McKnight 2002). But these works do not reveal clearly how the regional and international liaison networks in East and Southeast Asia were constructed and maintained, and how they collapsed.This paper describes the international and regional communist movement in East and Southeast Asia in the late 1920s and early 1930s, focusing mainly on activities of the regional headquarters of the Comintern in Shanghai. In 1926 the Comintern established the Far Eastern Bureau (FEB) in Shanghai, followed by the Pan-Pacific Trade Union Secretariat (PPTUS) in 1927. These two organizations were in charge of supervising local communist movements in East and Southeast Asia, allocating funds, dispatching couriers and agents, and receiving local communists who tried to go to Moscow. To conduct these works, it was crucial to construct and maintain a liaison network in the region. Construction and maintenance of this liaison network was done by agents and couriers who had contacts both with staff of the regional headquarters in Shanghai and with liaison officers in local communist movements. The network of the international and regional communist movements in East and Southeast Asia in the 1920s and 1930s consisted of links between agents, couriers, the regional headquarters' staff in Shanghai, and local liaison officers acting as nodes. This paper shows how this international and regional network was constructed in the late 1920s, how it was maintained, and finally how it collapsed in 1931. …