The first documented 400 m hurdles race for women took place in 1971. in 1974, the International Amateur Athletics Federation (IAAF), now known as World Athletics, introduced the event officially as a discipline, although it was not run at the Olympics until 1984 Los Angeles games where it was first staged, the first Men's World Champion having been crowned the year before at the inaugural World Athletics Championships. A special edition of the Women's 400m Hurdles happened in the 1980 IAAF World Championships in Athletics in response to the Women's 400m Hurdles not being included in the boycotted 1980 Moscow Olympics and the Liberty Bell Classic.