So I am watching band of brothers with my father and a couple episodes (in particular one about Bastogne) made obvious that a lot of soldiers had difficulty keeping it together sanity wise ( which is absolutely understandable given how nasty the war was). It seems like soldoers would not react to people talking to them, stare off in the distince, say off topics things, shakes, etc etc. It seems like somrtimes the signs were subtle as to who was cracking from stress as everyone is breaking to a certain degree. Are there any accounts of how officers might handle a case like this in the field ie if they needed to fight and the person could not be rotated to the back of the line? For example, meditation is something that is becoming popular. That wasnt a well established thing back then. Was the only option to give the person room to breathe?
Not to discourage further answers but you might find the FAQ on PTSD helpful.
There are two great books from first person accounts from the Pacific theater of war from WWII, which actually ended up being the source material for the HBO show "The Pacific" which you might find good reads, I did.
First "Helmet for my pillow" by PVC Robert Leckie. Leckie served during the Guadacanal, Cape Gloucester, and Peleliu campaigns.
Second "With the old breed: At Peleliu and Okinawa" by Corporal Eugene Sledge who served during the Peleliu and Okinawa campaigns.