Leave accumulated as enlisted should not be lost. Prior to going to OCS you had to obligate for a number of years depending on the program you are going into. Prior to your re-enlistment is when they ask if you want to sell back leave and then adjust your balance of leave to your EOS. Officers accrue leave just as fast as we do anyway. If they took our leave, then they would still have to pay us back. I know when I report I will have around 45-50 days on the books and I am not giving a day of it back to Uncle Sam.