I am surprised they returned you to duty, Are you acitve, Reserve or ANG? Is it your intent to try and stay in? The problem with Type-1 on active duty is deployability and taxation on your units resources as a T1 as well as the possible dangers you subject those around you to as T1 in training and/or deployment. To me as a T1 I was not willing to subject my fellow Marines, my unit or myself to the dangers and attention T1 requires by myself and others to maintain my health. Deploying to me with type-1 is extremely dangerous to the diabetic as well as the unit. Questions I ask: does everyone around you know how to treat you if you go down in a hypoglycemic episode? Most people you ask will probably tell you they would give you a shot of insulin..... obviously for us T1's we know that is the opposite remedy and assuming hey do know how to treat a hypo situation do those around you know where you always keep simple sugars or a glucagon pen on your person? Who and how will you maintain all the necessary supplies needed to maintain your t1 and what happens if your supplies run out or lose/get destroyed in a deployment scenario?
Your body can not physiologically regulate itself anymore and no matter how well you think you have it controlled in an isolated environment the uncontrolled environmental stressors of military training and deployment put you in many dangerous and potentially life threatening situations even without T1, now throw those stressors at your t1 body which has no ability to monitor or control your BG levels and that is a recipe for disaster given your own risk and those that may depend on you while in harms way.
Things to think about that you may not have experienced yet as an early T1 and the potential risks brought on by T1. I thought I could beat T1 until after a few years and full destruction of my pancreatic beta cells and several episodes of hypoglycemia did I realize the inherent dangers of this disease. I did not want to reduce the capacity of my unit nor serve in a reduced capacity which as a T1 I realized I am both.