Never heard of this before. Eisenhower ordered Exercise Tiger which was a practice run for the landing at Utah Beach. They picked a stretch of the British coast and decided to do a live fire secret exercise landing. Well someone forgot to tell the Germans it was a secret and the proceeded to sneak in 9 boats into the exercise and sink numerous landing craft killing 700 Americans. Then there was a mix up in the times so troops landed on the beach just in time for the beach to shelled killing even more Americans. The whole thing was covered up and soldiers were threatened with court martial if they ever talked about it. It's estimated that up to 946 people were killed during the exercise.


















































