The name came from the stand in Ajax' former stadium De Meer Vak F.[4][5] The F-side was founded in 1976.The F-side has also many clashes with the North Side of ADO Den Haag and the Bunnikside of FC Utrecht.During the battle Carlo(s) Picornie, an F-Side top boy, was killed and several other people were seriously injured.Feyenoord fans came armed with bats, chains, bottles, Molotov cocktails, and tasers, many of which were seized by police after the battle.The death of Picornie is still fresh in the minds of Ajax fans and, to this day, his seat is left unoccupied at the stadium in remembrance of his murder.