HELP PLEASE GIVE ADVICE:MILITARY :i live in georgia and i was charged with a felony?

three three years ago i was charged with forgery . i was 18 years of age at that time... i was a first offender with no previous record or juvenile record. I WORKED AT MCDONALDS AND THE MANAGER GAVE ME TWO CHECKS ONE OF THEM WERE NOT MINE BUT IT HAD THE FIRST BUT NOT LAST ME BEING DUMB I SIGNED BOTH CHECKS AND THEY PRESSED CHARGES.. OK TO SUMMARIZE IT ALL. I TURNED MY SELF IN I ONLY STAYED IN JAIL TO PROCESS WHICH ONLY TOOK TWO HOURS ...I GOT OFF AND WENT TO COURT. I HAD A LAWYER WHICH KNEW THE D.A.I PLEADED GUILTY UNDER THE FIRST OFFENDER LAW (HERES THE FUNNY PART) I ONLY PAYED THE AMOUNT OF THE CHECKS BACK..THERE WAS NO COURT FEES NOR PROBATION...THE CASE WAS DISMISSED /NOLLE PROSSED.AND I ALSO EXPUNGED IT FROM MY PUBLIC RECORD AND IM STILL WORKING FOR MCDONALDS BUT NOT FBI..OK ? IS THERE ANY POSSIBLE WAY TO GET IT CLEARED PERMANENTLY...SO I CAN JOIN THE MILITARY BECAUSE THE MILITARY BRANCHES ARE NOT CURRENTLY EXCEPTING FELONIES...AND PS I KNOW ABOUT PARDONS BUT DON'T KNOW MUCH ABOUT THEM