 According to military equestrian Denis Bogros, the economic weight of the Norman horse breeders was such as they negatively influenced the effectiveness of the French army until the early 20th century, producing only large, overweight trotters that became fatigued more easily than Barbs or Arabians.Bogros states that breeders of Norman horses managed to deceive the French government, through powerful lobbying groups, by selling the military rejects from the breeding programs.The Anglo-Norman was a commercial success as carriage horses, but proved worthless for the cavalry.