Exercise Tiger, or Operation Tiger, was one of a series of large-scale rehearsals for the D-Day invasion of Normandy, which took place in April 1944 on Slapton Sands in Devon. Coordination and communication problems resulted in friendly fire deaths during the exercise, and an Allied convoy positioning itself for the landing was attacked by E-boats of Nazi Germany's Kriegsmarine, resulting in the deaths of at least 749 American servicemen. Because of the impending invasion of Normandy, the incident was under the strictest secrecy at the time and was only nominally reported afterwards. Exercise Landing operations In late 1943, as part of the build-up to D-day, the British government set up a training ground at Slapton Sands, Devon, to be used by Force "U", the American forces tasked with landing on Utah Beach. Slapton Beach was selected for its similarity to Utah Beach: a gravel beach, followed by a strip of land and then a lake. Approximately 3,000 local residents in the area of Slapton, now South Hams District of Devon, were evacuated. Some...