<P> Documents obtained in 2016 revealed the Soviet Union's plans for a statewide doping system in track and field in preparation for the 1984 Summer Olympics in Los Angeles . Dated prior to the country's decision to boycott the Games, the document detailed the existing steroids operations of the program, along with suggestions for further enhancements . The communication, directed to the Soviet Union's head of track and field, was prepared by Dr. Sergei Portugalov of the Institute for Physical Culture . Portugalov was also one of the main figures involved in the implementation of the Russian doping program prior to the 2016 Summer Olympics . Filmmaker and director of 2017 movie Icarus Bryan Fogel has said that stricter doping controls might have been the main reason for the Soviet boycott . </P> <P> Listed in the chronological order of their withdrawal, not by alphabetical or any geographical order . 15 or 18 (from different sources) in all . </P> <Ul> <Li> Soviet Union </Li> <Li> Bulgaria </Li> <Li> East Germany </Li> <Li> Mongolia </Li> <Li> Vietnam </Li> <Li> Laos </Li> <Li> Czechoslovakia </Li> <Li> Afghanistan </Li> <Li> Hungary </Li> <Li> Poland </Li> <Li> Cuba </Li> <Li> South Yemen </Li> <Li> North Korea </Li> <Li> Ethiopia </Li> <Li> Angola </Li> <Li> Three others also boycotted the games, citing political reasons, but were not a part of the Soviet led boycott . <Ul> <Li> Albania </Li> <Li> Iran </Li> <Li> Libya </Li> </Ul> </Li> <Li> One was largely unrecognized and therefore not allowed to compete, whether or not it wished to: <Ul> <Li> Kampuchea </Li> </Ul> </Li> </Ul> <Li> Three others also boycotted the games, citing political reasons, but were not a part of the Soviet led boycott . <Ul> <Li> Albania </Li> <Li> Iran </Li> <Li> Libya </Li> </Ul> </Li>

Who boycotted the 1984 summer olympics in los angeles
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