You might have an error in your figure. On a world wide scale, the last estimate I saw of deaths caused by WWII was about 50 million. In 1940 the estimated population of the United States was 132 million. Since we are writing about deaths in the United States, The United States could not have lost 100 million killed in WWII.
My claim is for TOTAL deaths in WWII and stands, reasonably, at 100 million.