I haven't read yet, but I recall ZA getting bitched at in a few reviews for not knowing military speak or some similar thing. ZA, if I recall, was in the Army. What my husband says (in the Corps for a long time) is that protocol can and does change over time, and can even vary based on who/where you serve. Things can and do shift to serve the purpose/objective too. He reads a lot of military type novels and when he comes across something different, he usually just writes it off as different time, different place.