The United States Forces Korea (USFK) is a sub-unified command of U.S. Indo-Pacific Command (USINDOPACOM). USFK is the joint headquarters for U.S. combat-ready fighting forces and components under the ROK/US Combined Forces Command (CFC) – a supreme command for all of the South Korean and U.S. ground, air, sea and special operations component commands. Major USFK elements include U.S. Eighth Army (EUSA), U.S. Air Forces Korea, U.S. Naval Forces Korea (CNFK), U.S. Marine Forces Korea (MARFORK) and U.S. Special Operations Command Korea (SOCKOR). It was established on July 1, 1957.

The Special Operations Command Korea or SOCKOR, the United States (U.S.) Theater Special Operations Command (TSOC) in the Republic of Korea (ROK), is a Sub-Unified Command assigned under the Combatant Command (CCMD) of United States Special Operations Command (USSOCOM), who delegated Operational Command (OPCON) of SOCKOR to the U.S. Indo-Pacific Command (USINDOPACOM) Commander, who further delegated OPCON of SOCKOR to the United States Forces Korea (USFK) Commander.