The breakdown by race is interesting. 12.5% were "negro" (I shall refer to them as African American - AA, from now on).
I have often heard that the proportion of AAs killed was much higher than their demographic representation in the US. However, that doesn't seem to be true as the US demographics seem to correlate quite closely to the casualty rates.
However, what seems to be the case is that if one breaks it down by race and service, this perception of higher casualties is true for the US army. But then again, the other three services were very under-represented:
http://members.aol.com/warlibrary/vwc10.htm
And "Mongolian"? Is that from Mongolia or a very dated term for "mixed race"?