U.S. Strategy Names Seoul as Lead Deterrent Against North Korea The National Defense Strategy released on Jan 23 designates South Korea as the primary force to deter North Korean aggression, moving much of the security burden onto Seoul while the United States retains a supporting role [1][2]. The shift aligns with a broader Pentagon effort to revise its force posture on the peninsula, reflecting evolving regional dynamics [1]. Washington will continue providing essential capabilities such as missile defense and intelligence sharing, but overall involvement will be more limited than in previous decades [2].

North Korea Characterized as Direct Nuclear Threat to the United States The document labels Pyongyang’s nuclear arsenal a “clear and present” danger capable of reaching the U.S. mainland, underscoring the urgency of a robust deterrence framework [1]. This assessment drives the emphasis on a strong allied lead in containment and reinforces the strategic rationale for reallocating responsibilities. The strategy highlights the need for rapid, coordinated responses to any nuclear escalation from the North.

South Korea’s Military Strengths Form Basis for Lead Role The strategy cites South Korea’s sizable armed forces, high defense spending, advanced defense industry, and mandatory conscription as key assets enabling it to assume primary deterrence duties [1]. These capabilities are presented as sufficient to confront the North’s threats without a full‑scale U.S. troop surge. The assessment also notes Seoul’s political resolve, given its proximity to the threat.

U.S. Adjusts Support Without Immediate Troop Reductions The policy does not call for a reduction of U.S. forces stationed in South Korea, but rather a recalibration toward support functions such as missile defense and intelligence [2]. It emphasizes strengthening incentives for allies in Europe, the Middle East, and the Korean Peninsula to take on greater defense responsibilities while receiving limited U.S. assistance [1]. This approach aims to balance burden‑sharing with continued American security guarantees.