I assume that hardly any of your officers are actually black? Contrary to what Hollywood would have us believe where every rank between Sergeant and Colonel seems to be a Hebrew.
Uh.... i dont know the answer. I never really even paid attention to the racial statistics.
But now that you mention it, no, there weren't a lot of black officers. There were a few here and there, and a couple Warrant officers were black... but the vast majority of officers that i saw were white, and a couple latinos/Hispanics.
Tons of hispanic enlisted, small percentage of blacks, smaller percentage of asians.
Senior enlisted seemed to be fairly racially even.