Nearly More died in rehearsal of DDay in UK than DDay itself
en.wikipedia.org
en.wikipedia.org
Exercise Tiger:
749 killed ~200 wounded 2 LSTs sunk 2 LSTs damaged
Operation Overlord:
United States 124,394 casualties; 20,668 killed United Kingdom ~65,000 casualties; 11,000 killed; 54,000 wounded or missing Canada 18,444 casualties; 5,021 killed Poland 2,097 casualties
Title is still off.