Jack Le Goff, the man who defined the eventing program in the United States, died July 24 in France. He was 78.

The legendary horseman revolutionized the United States equestrian program and defined an era with medals and championships.

Mr. Le Goff’s coaching record at international championships was exemplary. His teams won medals at four consecutive Olympic Games and three consecutive World Championships. He brought some of the biggest names in the sport over the past three decades to fruition.