sentences:  These were the first Summer Olympic Games under the IOC presidency of Juan Antonio Samaranch.The 1984 Games were boycotted by a total of fourteen Eastern Bloc countries, including the Soviet Union and East Germany, in response to the American-led boycott of the previous 1980 Summer Olympics in Moscow in protest of the Soviet invasion of Afghanistan; Romania was the only Eastern Bloc nation that opted to attend the Games.Iran and Libya also chose to boycott the Games for unrelated reasons.