From the racetrack to the battlefield—dauntless, fearless, and exemplar of Semper Fi—she was Reckless, "pride of the Marines." A Mongolian mare who was bred to be a racehorse, Ah-Chim-Hai, or Flame-of-the-Morning, belonged to a young boy named Kim-Huk-Moon. In order to pay for a prosthetic leg for his sister, Kim made the difficult decision to sell his beloved companion. Lieutenant Eric Pedersen purchased the bodacious mare and renamed her Reckless,...