In general, you are eligible for enlistment in the U.S. Army if honorably discharged from another military branch. Along with a favorable separation from your prior service branch, you must meet the standard enlistment eligibility requirements for the Army. Each branch of the military actually assigns Reenlistment Eligibility codes to soldiers at the time of their discharge. These RE codes indicate the soldier's status for potential Army enlistment.
Additional Information
The Army lists the various RE codes and their meanings for each of the other four military branches on its website. The Navy and Coast Guard have the same RE coding system, while the Marines and Air Force each have their own. The most straight-forward RE code indicates that a soldier is fully eligible for Army enlistment if he meets other qualifying criteria. Other codes indicate that a soldier may qualify, but an eligibility waiver is required. The final set of codes indicates a soldier is not eligible at all.
