On the morning of May 27, 1944, a rare and potentially deadly incident unfolded beneath the waves of the Pacific Ocean, involving two U.S. submarines, the USS Lapon (SS-260) and the USS Raton (SS-270). Both submarines were known for their successful patrols, hunting enemy vessels that threatened the war effort. What happened that day, however, is an example of the unpredictable nature of submarine warfare—an accidental incident of friendly fire that could have ended in disaster but instead ended in a miracle.