Where and when were the first World Games held, to provide a world forum for sports not contested in the Olympic Games?

Question

Due to a foot-and-mouth disease outbreak in Britain at the time of the 1956 Melbourne Olympic Games and the strict quarantine laws of Australia, where were the equestrian events held?

Answer 1

California, United States, 1981
London 1985 was the venue for the second Games; Toronto 1985 was the first venue for the World Masters Games; Paris 1924 was the first venue for the Deaflympics.