Republic of Korea War Service Medal To be eligible, U.S. military personnel must have: (1) served between June 25, 1950, and July 27, 1953; (2) been on permanent assignment or on temporary duty for 30 consecutive days or 60 non-consecutive days; and (3) performed their duty within the territorial limits of Korea, in the adjacent waters or in aerial flight over Korea participating in or in support of combat operations.