If he has a chance to go to the Mountain Warfare Training Center at Pickle Meadows, CA (Sierra Nevada Mountains), encourage him to go. It is outstanding training for those who may be required to operate in small units or battalion sized units at high altitude. We learned some very tough lessons in the Mountains of Korea, fighting in the winter. This school was designed to teach those lessons learned. It has been continuously improved, with modifications made from our lessons learned in Afghanistan. You will learn what needs to be considered when you take a large group of Marines up above 10,000 feet for protracted operations. Oh, and by the way, it is beautiful - up there was the day that I stopped and said, "I can't believe I am getting paid to be here."