Tip - How to Re-enlist With a RE-4 Code | eHow

Re-enlistment eligibility (RE) codes characterize a veteran’s prior service. They can range from a full-blown welcome back any time (RE-1) to a brick wall that forever bars re-enlistment (RE-4). RE-4 is military shorthand indicating not only that you were trouble in your prior service but also that nobody wants you back. While any number of...