Of course it didn't occur to you, conclusion jumper that you are, that he was referring to a secondary school military academy.
There's a shit load of 'em you know.
If it was really one the 3 national service military academies he was referring to how likely is it that he, or anyone commissioned from one of those schools, would not proudly identify as such?
Shit load a demerits for you for conclusion jumping and for not thinking things through.