Lee Marvin did enlist in the U.S. Marines, saw action as Private First Class in the Pacific during World War II, and was wounded (in the buttocks) by fire which severed his sciatic nerve. However, this injury occurred during the battle for Saipan in June 1944, not the battle for Iwo Jima, which took place several months later, in February 1945. (Marvin also did receive a Purple Heart, and he is indeed buried at Arlington National Cemetery.)

Bob Keeshan, later famous as television's "Captain Kangaroo," also enlisted in the U.S. Marines, but too late to see any action during World War II. Keeshan was born on 27 June 1927 and enlisted two weeks before his 18th birthday, months too late to have taken part in the fighting at Iwo Jima. A 1997 interview with Keeshan noted that he "later enlisted in the U.S. Marines but saw no combat" because, as Keeshan said, he signed up "just before we dropped the atom bomb."