On D-Day, Allied troops landed on the beaches code-named Omaha, Utah, Juno, Sword and Gold, carried by 7,000 boats. On that single day, 4,414 Allied soldiers lost their lives, 2,501 of them Americans.
Link: https://www.chron.com/news/article/World-War-II-veterans-honored-a-day-before-D-Day-17220595.php