military service

I was seperated from the military a year before my obligation was up, but was still given an honorable discharge. Should I put it on my application or just forget about those years?

So I'm in the AFROTC program at my university. I want to go to medical school, but I wanted to serve my four year commitment before hand. I'm currently a biology major, and hoping to work as a laboratory technician or scientist of some sort. Would I be at a disadvantage going to medical school...