Army: White 63.9%, Black 19.0%, Hispanic 10.3%, Asian 3.8%
USA: White 75%, Black 12%, Hispanic 15%, Asian 4%
So hispanic is underrepresented in the army and black over represented - of course you would have to balance these by age profile for each group and also consider US overseas territories that can join the army.
Young blacks became underrepresented after the Iraq wars, but high NCO ranks are still heavily overrepresented.
Conversely, marine accessions are on the rise for young hispanics, and they are now slightly overrepresented. High NCO ranks are underrepresented, but diminishingly so.
So this is definitely a trend, but not a major one. Those mentions may have more to do with what contributes to the trend than be caused by it.
Army: White 63.9%, Black 19.0%, Hispanic 10.3%, Asian 3.8%
USA: White 75%, Black 12%, Hispanic 15%, Asian 4%
So hispanic is underrepresented in the army and black over represented - of course you would have to balance these by age profile for each group and also consider US overseas territories that can join the army.