The medal was originally offered by the ROK in 1951 to United Nations forces serving in Korea and adjacent waters. At the time U.S. law prohibited the U.S. military from wearing medals issued by foreign governments. Congress changed that in 1954, but by then most U.S. service members eligible for the medal had returned home.

In 1998 the government of the Republic of Korea renewed its original offer of the ROKWSM to U.S. military personnel. On Aug. 20, 1999, the Defense Department approved the acceptance and wear of the medal. Approximately 1.8 million U.S. veterans of the Korean War are eligible to receive it. Next of kin to eligible deceased veterans can also apply for the medal.

To wear this medal on U.S. military uniforms, U.S. military personnel must have:

served between the outbreak of hostilities, June 25, 1950, and the date the armistice was signed, July 27, 1953; been on permanent assignment or on temporary duty for 30 consecutive days or 60 non-consecutive days, and performed their duty within the territorial limits of Korea, in the waters immediately adjacent thereto or in aerial flight over Korea participating in actual combat operations or in support of combat operations .

The ROK specifies the eligibility period and criteria. Only the ROK-provided medal is approved by the U.S. government to meet the U.S. criteria for wear on the military uniform.

To apply, veterans must provide a copy of their discharge paper, commonly known as a "DD-214," or a corrected version of that document, a "DD-215." National Guard members must provide their statement of service equivalent, "NGB Form 22."

Because the order of precedence for non-U.S. service medals and ribbons is determined by date of approval, the ROKWSM should be worn after the Kuwait Liberation Medal, which was the last foreign medal approved for wear by U.S. military personnel. For the majority of Korean War veterans the medal will be worn after the United Nations Medal, or the Republic of Vietnam Campaign Medal if they served during that conflict.

Note: DMZ War veterans who came under fire between July 27, 1953 and the present are not eligible for this medal. Almost 100 Americans died in the years following 1953 and over 224 were were wounded.

Instituted: 1999 Criteria: The medal may be awarded to all military personnel who served 30 consecutive days or 60 non-consecutive days in Korea or in its territorial waters. The medal may also be awarded to aircrew personnel who flew combat or support missions over or to Korea. Notes: This medal was initially proposed by the South Korean government in 1951 to honor all United Nations troops who battled the communist aggressors during the Korean War. After 48 years, the medal was finally approved by the Department of Defense.

5. The Korean Service Medal may be awarded posthumously.