Southeast Asia Crossroads Communism in its revolutionary, modern and totalitarian form was introduced in Asia in the early 20th Century. This happened after the October Revolution in the Soviet Union, however, many institutions and ideas around communism like state ownership, political authoritarianism, economic egalitarianisms had existed in the Asian history. Communism was embraced in Asia as a counterforce against the western imperialism and also after the World War 2. The US troops entered the Vietnam war in an attempt to prevent the spread of communism.