Wow, so I have been a lurker here for a while. My FI has been talking about re-enlisting into the Marine Corps for a while now and we finally decided it is what is best for our family (we hit a wall with him getting a steady job...not for lack of trying... just very hard to get anything right now out here). FI was in the Marines for 4 years (was a Sgt), then got out.
Anyway, I'm 26, he's 25 (26 in Sept). He has been talking about doing I&I Duty when he goes back. I will be very very honest and say that, I know very little about USMC but I am trying to learn as we go. And he does his best to explain things to me.