As regards your first question, there is basic training on stress problems, which includes post-traumatic stress disorder. That's part of the basic training of all military members at the base in Saint-Jean.
Basic military training includes training in the effects of stress and post-traumatic stress disorder.
When you're on a mission, if you think you're having any kind of health problem whatsoever, you are not obliged to continue. You, yourself, can't decide that you're going home. What you do is present to your.... If you're out of the forward operating base, you would go to see your medical technician or your physician's assistant. If you were back at Kandahar airfield, you would go to the primary care clinic associated with the hospital at Kandahar airfield and describe the symptoms you're having: for example, I can't get to sleep; my heart is pounding all the time; I feel sick to my stomach; I'm having nightmares. Describe any of the symptoms you want. There's no law that says you came here four months ago and you have two months left to go and you're not getting out of here until then. The health care staff will make the judgment as to whether you can be treated in theatre and supported there or whether you need to go somewhere else.