May 1964, Peru
During an Olympic qualifying match between Peru and Argentina, the referee disallows a Peruvian goal just minutes from the final whistle. The move sparks protests from fans, which turn into riots after Argentina wins the match. The violence kills 318 people and injures more than 500.
January 1971, Scotland
Barriers on a stairway collapse as fans are leaving a match between Rangers and Celtic in Glasgow, causing a massive pile-up of fans. The accident kills 66 people, including many children, with bodies stacked as deep as six feet.