I have Ankylosing Spondylitis and Crohn's disease. I have had several bouts of iritis. I can understand your pain and the feeling that others think you are malingering. Regarding your military service I have no experience. I am going to send to a place to ask your question. It is for military folks with AS, run by the Spondylitis Assn of America. When you get to the home page, click "resources and support" along the top blocks. Then go to "message Boards and Forums", top block in right column. There you will find the list of forums. The Military and Veteran's Forum is about
halfway down. Really knowledgeable fellows there that can answer your military related questions. Sorry I can't link directly to that forum.
Here is the link:
www.spondylitis.org/main.aspx