Deterrence

March 27 (Asia Today) — The United States and South Korea have established a new joint command unit aimed at integrating nuclear and conventional forces to strengthen deterrence against North Korea, according to defense officials.

The unit, known as J10, has been set up within U.S. Forces Korea headquarters at Camp Humphreys in Pyeongtaek. It is designed to move beyond the traditional concept of a “nuclear umbrella” and enable real-time operational coordination between U.S. strategic assets and South Korean conventional forces.

Originally separated from the U.S. Forces Korea planning directorate in June 2024, J10 is led by a colonel-level commander and serves as a centralized command structure for combined nuclear and conventional operations.

Military experts said the creation of J10 marks a shift from declaratory deterrence to operational readiness, allowing faster execution of joint responses in the event of a North Korean nuclear threat.

The unit is expected to play a key role in implementing decisions made by the bilateral Nuclear Consultative Group established under the Washington Declaration, with the ability to coordinate immediate response measures from the Korean Peninsula.

J10 will oversee operational planning that aligns U.S. strategic assets – such as long-range bombers and nuclear-powered submarines – with South Korean support forces. It is also expected to match response options to specific North Korean threat scenarios to accelerate execution speed.

Previously, U.S. nuclear operations were largely managed by command structures based in the United States. The new arrangement places a dedicated coordination function on the Korean Peninsula, enabling continuous, real-time management of response planning.

Analysts said the move is intended to strengthen integration between South Korea’s “three-axis” defense system and U.S. nuclear capabilities, increasing military pressure on North Korea.

However, officials noted that the effectiveness of J10 will depend on the level of real-time intelligence sharing between the two allies.

A senior official described J10 as “the final piece” in building an integrated extended deterrence framework, adding that its capabilities will be tested in upcoming large-scale joint military exercises.

— Reported by Asia Today; translated by UPI

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Original Korean report: https://www.asiatoday.co.kr/kn/view.php?key=20260327010008515

The deterrence posture against North Korea will not be hindered regardless of a potential shift of military assets owned by the U.S. military stationed in South Korea, a senior official at Cheong Wa Dae said Wednesday, amid media reports that the U.S. Forces Korea (USFK) has shipped out some of its air defense assets from the Korean Peninsula.

“Given our level of military capability, defense spending, defense industry capacity and the high morale of our troops, there is no problem with deterrence against North Korea regardless of whether some USFK assets are relocated overseas,” the official said.

The official, however, declined to comment on media reports that parts of a Terminal High Altitude Area Defense (THAAD) system and other air defense units owned by the USFK were moved from South Korea amid a raging war in the Middle East.

“It is not appropriate for our government to comment on military operations between Korea and the U.S.,” the official said.

The official said South Korea and the U.S. have remained in close coordination to maintain a robust combined defense posture.

“Korea and the U.S. will maintain a robust combined defense posture to contribute to peace and stability on the Korean Peninsula and in the region,” the official said. “To that end, the two countries will continue close communication and coordination.”

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