Arlington National Cemetery; Wikimedia Commons.

THE STATISTICS

54,770,000 — total deaths in WWII

38,573,000 — civilians died in WWII

292,131 — Americans died in WWII

3,393 — Americans died on D-Day

6,603 — casualties (including deaths, wounded and prisoners) on D-Day

7,000 — Americans died on Iwo Jima

12,000 — Americans died on Okinawa

51,983 — Americans died in the Pacific

1,140,429 — members of the Japanese military died during WWII

700,000 to 10,000,000 (variously estimated) — Japanese civilians died in WWII

Source: Wikipedia