The troops in country now I'm sure are putting forth their best efforts, and learning hard lessons. Maybe they'll truly earn the designation "Mountain" before this is done...
Go get'em ya doggies!!
just surviving and moving at 12,000 ft (summer or winter) will kick your @ss, even if your in great shape. Experience means everything in that environment...not to mention a squared away logistics team...
The Indians are holding Siachen which is at 20,000Ft. More details here