Allow military veterans with HONORABLE discharges to re-enlist regardless of re-enlistment code or separation code. An HONORABLE discharge should suffice.
Also raise the max retirement age for military to 70 and raise the max enlistment age to 50. This will allow more people to join or re-join the military to learn a skill and put more people back to work.
Streamline the process for prior service veterans to re-enlist. Eliminate quotas and allow those who qualify back in. The military can't be too big.