The Tlatelolco Massacre occurred on October 2, 1968, in Mexico City, just days before the opening of the 1968 Summer Olympics. Thousands of students and civilians had gathered in the Plaza de las Tres Culturas to protest against the Mexican government, demanding political and social reforms. The military and police responded with violence, resulting in a tragic loss of life. Estimates of the number of casualties vary widely, with reports suggesting that hundreds may have been killed or injured. The event is a significant moment in Mexican history, highlighting issues of government repression and the struggle for civil rights, and it remains a symbol of resistance against authoritarianism.