you'd be hard pressed to find hand to hand combat in this current war. Especially considering the fact that both sides usually come forth bearing a lot of fire power and the fact that most gun fights are ended pretty abruptly when the insurgents get masacred or they run away because they aren't trying to fight a head on war.
Secondly, as a Marine, the training that we receive when we are in a school or in boot camp is a 24/7 epic mind fuck of stress. A complete rollercoaster of emotion and thought processes that you can't get control of unless you just stop giving a shit about the things that stress you out and start training so that you can still function and get the job done under these circumstances. By doing so, when in the event that you get into a life/death situation, you're already used to that level of stress so you don't feel it and can function really well.
occassionally you'll find that guy who freezes because he gets caught up in some ass backwards complex wherein he may be afraid because he fears he his going to lose his family back home if he gets killed but he never realizes that if he does get killed that he won't have a family to miss because he'll be dead.
and lastly the time spent in the classroom is minescule compared to the time spent applying the knowledge in the field during training, when it comes to the Marines at least.