By 1971 Mexico , ruled by the PRI , had organized two of the most important sporting events in the world : the 1970 FIFA World Cup and the 1968 Summer Olympics , gaining a fresh and modern image its government wanted to show to the outside world . At the same time , its government had violently repressed political youth movements known as the '' Tlatelolco massacre '' and the '' Halconazo '' , which in turn gave way to the so-called Mexican Dirty War of the early 1970s
Halconazo
Corpus Christi massacre
Festival Rock y Ruedas de Avándaro