Lyras wrote:To be honest, I think the OP may have something of a point.
The vast majority of America's combatants over the last two centuries have been white males. That group does seem historically under-represented, in the presented image.
Something cannot be historically under-represented in a present image. The words you assembled together there do not work that way.
You can say that white men have been historically over-represented in US military service and that you believe they are underrepresented in that particular image. But they cannot be historically anything in the present image.