That would be a reasonable assumption but it is not true. The US military has 95% high school graduates (including some GDE). The article I linked to shows that only 71% of high schoolers graduate, at least that was true in 1998. There is no way for that figure to have gone up in the last 8 years. Repeat: US military 95%, generakl population 71%. The Black and Hispanic folks who make it in the military are on the upper end of their respective groups.