Diabetes and service - any connection?

Ok, since I was reminded, I will now bless you all with my theory. Understand I am not a scientist nor a trained medical personality. I am just a Personality so here goes my layman theory.

The body has a natural immune system. In the military we keep our immune system hyper vigilant with all the stateside required inoculations as well as all the extras that we get for deploying to various countries. We also keep ourselves in shape with more physical exercise then most civilians.
Then we get out of the military, our exercise stops or slows down and we stop getting inoculations. during this time in service our auto immune system is constantly working to get all negative things and create antibodies for those negative things. Then we get out, slow down and stop getting shots, well our bodies start looking for things to fight, we just taught to keep fighting for 8 to 20 or so years. It finds insulin at the pancreas and starts fighting that until such time as the pancreas stops producing insulin. So my theory is that we get it do to all the inoculations that we received. Now I am sure that there will be people to poke all sorts of educated holes in my theory, and that is alright, so ready, set, Go!

I was diagnosed in 2009 a few months after I retired.

Type II, within 3 years of getting out. Though I have Genetics as a factor, I also am Native American and Latino origin. Each of which is 30% more likely to develop. My own personal theory has to be do with the recent (last 150 years) sedentary nature of all ethnicity which have a pre-disposition towards diabetes. The higher rates seem to follow those peoples who industrialized later/not at all. There is reference in old journals of those practicing medical arts noting peculiar diseases which had the urine tasting sweet. Yes they tasted urine once upon a time. The belief is that early industrialized nations went through a period of adjustment where diabetes affected the population and then the population leveled out. Personally, as the smallest (in girth) of 4 brothers, and the only one with diabetes; I think that the extreme exercise regimen which was part of the daily life of a service member was a part of the problem. In that after 6 years of daily PT, converting to a desk job places the body into shock causing the pancreas to fail. No science on my part just observation and analytics with a little bit of historical research.