It's all about your HBa1c result.
When I was first diagnosed 4 1/2 years ago, they try to serve me discharge papers. I fought against it of course - at the time I was the fittest female within the regiment, receiving awards left right and centre for my achievements, how could they discharge me?!! - Looking into it more though, although your level of fitness is a huge tick in the box, it's all about how you manage your bloods.
I knew a postie also with type 1, same rank, fit as a fiddle, but HBa1c all over the place. Over a period of time (and many more blood tests) his HBa1c level still didn't come down. He was discharged only last year. It didnt help the fact either that he would use his type 1 to get out the majority of things and "**** jobs".
It is how you manage yourself and how stable your blood groups are plus your attitude. That's why I'm still serving now.
Good luck on your Sahara trek! Make sure you have plenty of lucazade/gluca gel with you! (My life support on long fitness sessions!)
But remember, your blood tests never lie

the lower you can your HBa1c, the slimmer the chance of being discharged
