The Donald Trump administration is reportedly discussing a new nuclear strategy that emphasizes the use of short-range tactical nuclear weapons to counter China and Russia. This has raised speculation about the potential deployment of U.S. tactical nuclear weapons in allied nations like South Korea and Japan.
On August 5, NBC News reported, citing anonymous sources, that the Pentagon is reviewing a nuclear strategy overhaul that would significantly expand the role of tactical nuclear weapons in preparation for regional conflicts involving China and Russia.
According to the report, the draft of this new nuclear strategy, spearheaded by Elbridge Colby, Deputy Assistant Secretary of Defense for Strategy and Force Development, focuses on increasing reliance on short-range tactical nuclear weapons rather than long-range strategic missiles.
While strategic nuclear weapons are designed to destroy large areas, tactical nuclear weapons are intended to neutralize specific enemy units or bases within a limited range.
A senior Pentagon official told NBC that its view is that it needs credible nuclear options, predicting that the new strategy to increase the use of short-range tactical nuclear weapons would enhance deterrence both regionally and globally.
Colby was reportedly scheduled to discuss the newly designed strategy at a closed-door event during his visit to U.S. Strategic Command in Nebraska that day. STRATCOM oversees U.S. nuclear operations and strategic deterrence, and is also tasked with providing extended deterrence capabilities to key U.S. allies, including South Korea.
U.S. forces had deployed tactical nuclear weapons in South Korea from 1958 until 1991. During the Roh Tae Woo administration, following the Inter-Korean Basic Agreement, all tactical nuclear weapons were withdrawn from South Korea in accordance with the Joint Declaration on the Denuclearization of the Korean Peninsula, which prohibited nuclear testing, production, storage, and possession on the peninsula.
Since then, whenever calls for South Korea’s nuclear armament or demands for the redeployment of tactical nuclear weapons have arisen in response to North Korea’s advancing nuclear capabilities, the U.S. government has maintained its commitment to provide a nuclear umbrella.
U.S. Considers Tactical Nukes for Close-in Deterrence in Northeast Asia
Recent developments have forced the U.S. to reconsider its nuclear posture in the region. North Korea has been strengthening military cooperation with Russia, including plans for an 8,700-ton nuclear-powered submarine and enhanced underwater and maritime missile delivery systems. Meanwhile, China continues to bolster its nuclear capabilities. These factors have created conditions where the U.S. must contemplate the use of tactical nuclear weapons for close-in deterrence in Northeast Asia.
Colby has long advocated for strengthening deterrence through tactical nuclear weapons that can be realistically employed in military scenarios, rather than relying on strategic nuclear weapons with a low likelihood of use.
Given Colby’s deep involvement in shaping the Trump administration’s 2026 National Defense Strategy (NDS), the adoption of this new strategy is expected to significantly impact the security landscape of U.S. allies South Korea and Japan, which border China and Russia.
However, analysts suggest that in the initial planning stages, Colby may issue declarative messages towards China and Russia and observe their responses before proceeding to actual implementation.
Shin Jong-woo, Secretary General of the Korea Defense Security Forum, stated that the U.S. review of its new nuclear strategy reflects Washington’s concern over the military alignment and external expansion of North Korea, China, and Russia. Moreover, North Korea’s nuclear tests and enhancement of delivery systems have essentially nullified the Joint Declaration on the Denuclearization of the Korean Peninsula. He added that if military pressure from North Korea, China, and Russia intensifies, the U.S. may consider exceeding its previous limits and redeploying tactical nuclear weapons in Northeast Asia.
Secretary General Shin explained that however, in the initial planning stages, the U.S. may exert rhetorical pressure and monitor for changes in attitude. If no changes occur, the possibility of actualizing tactical nuclear redeployment cannot be ruled out.
The South Korean Ministry of Defense has been maintaining close communication regarding the Nuclear Posture Review (NPR), which outlines U.S. nuclear policy and direction. However, it is reported that discussions have not yet occurred regarding the specific nuclear strategy issues led by Deputy Assistant Secretary Colby.
