While I doubt that enlistment in South Korean army will render you deportable. Please note enlistment in the armed forces that service of a foreign country may impact your eligibility for U.S. naturalization in as much as service in the armed forces of a foreign country. Even a friendly one like South Korea may be deemed to constitute your allegiance to a country other than the United States.
Answered on Jun 11th, 2014 at 8:14 PM