Shoulder and the military

I am in the military and we are about to be mobilized. I have had surgery on my left shoulder. THey went in and had to remove all the cartlidge out of that shoulder. I have dislocated that shoulder over 20 times over the years and this led to the breakdown. The surgeon said arthritus ate up the the cartlidge. Now almost a year later I dont have the range of motion and no strength in that shoulder. I have arthritus all in the shoulder also. THe surgeon said my only other option is replacement. ANy army guys out there think I can go to Iraq and perform?? I cant pick arm up over my head.> I meet with the military doctor in a week