2 mistakes I made while I was in the Marines. 1) I turned down the offer while I was in boot camp to go into OCS. 2) I didn't go into the reserves and get my 20 in. Either/Both would have changed my life and put me into a better position at retirement .When I got my RealID DL in MD last year, I brought my DD214 along and now my DL has "Veteran" on it. Of course as with @Brian D , I have a retired ID card, so am good to go.