I met this girl once. Beautiful, veeeery smart, young, etc... Unfortunately, before I met her she had already made up her mind to join the Air Force. At some point during her basic training she injured her thumb and was given a discharge. From what I gathered, the military breaks you down to build you back up during basic. Compound the breaking down proceedure with the physical/mental failure on her part and the result is one crazy, depressed bitch. I just thought I'd share that.
I have several friends that were in the Marines. Good luck. Hoo-rah!