Udover mandlig værnepligt i Sydkoreas eget militær udvælges 1.800 engelskkyndige mænd hvert år til at tjene 21 måneder i [[KATUSA|KATUSA (Korean Augmentation Troops to the United States Army)]]-programmet for yderligere at hjælpe ''United States Forces Korea'' (USFK).<ref>{{cite web |url=http://www.globalsecurity.org/military/agency/army/8army.htm |title=Eighth United States Army (EUSA) |date=27. december 2005 |access-date=6. februar 2010 |publisher=GlobalSecurity.org |quote=The KATUSA Program is significant not only because of the military manpower and monetary savings that it provides to the U.S. Army, but also because it represents ROK/U.S. cooperation and commitment to deter war. The KATUSA Program is symbolic of ROK/U.S. friendship and mutual support. |archive-date= 3. december 2010 |archive-url=https://web.archive.org/web/20101203175911/http://www.globalsecurity.org/military/agency/army/8army.htm |url-status=live }}</ref> I 2010 betalte Sydkorea 1,68 billioner [[sydkoreanske won]] (9,7 mia. [[Danske kroner|DKK]]) i støtte til de amerikanske styrker i Sydkorea, ud over budgettet på 29,6 billioner won (170 mia. DKK) til sit eget militær.
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