Most military CQB are based on different forms of Martial Arts, where they have picked out the "moves" that suits that type of combat best.
I've been instructing in unarmed combat a few years, and the form we use here are based on Kickboxing, Krav Maga, and many others.
But you can pretty much forget about the high kicks, jumps and other "fancy" moves that looks good in the movies.
They are pretty much useless when you're wearing your BDU's, Helmet and full combat gear, and you haven't got much sleep or food the last 7 days..
Then it's just not possible (or practical) to kick any higher than the groin..
But if you know Martial Arts before you join, then my experience is that you'll learn unarmed military CQB much faster/easier, since you know at least the basics.