The veteran served on active duty for 29 months and 29 days of a 36-month obligation. Military Separation Codes are located on form DD214 and are used to categorize. These codes are contained in your military records and may be annotated on various military separation documents, but aren't always explained. View Military Separation Codes — Alphabetical Codes View Military. Separation Program Designator Codes for Active Service Separations (FOR OFFICIAL.