Elbridge Colby and the Reordering of the Indo-Pacific |
When the United States releases a National Defense Strategy, it is tempting to read it as a snapshot of the moment—a reflection of the threats, priorities, and politics of a particular administration. The 2026 National Defense Strategy demands a different take. It is less a snapshot than a settlement: the point at which a decade-long argument about U.S. power, limits, and prioritization hardens into enforceable doctrine.
This strategy does more than elevate China as the pacing challenge or place the Indo-Pacific at the center of U.S. defense planning. It narrows the range of acceptable ambiguity, restructures alliance expectations, and quietly redraws how much room U.S. partners across the region have to maneuver.
When the United States releases a National Defense Strategy, it is tempting to read it as a snapshot of the moment—a reflection of the threats, priorities, and politics of a particular administration. The 2026 National Defense Strategy demands a different take. It is less a snapshot than a settlement: the point at which a decade-long argument about U.S. power, limits, and prioritization hardens into enforceable doctrine.
This strategy does more than elevate China as the pacing challenge or place the Indo-Pacific at the center of U.S. defense planning. It narrows the range of acceptable ambiguity, restructures alliance expectations, and quietly redraws how much room U.S. partners across the region have to maneuver.
Formally, the strategy defines a security environment shaped by four core challenges: China as the primary pacing threat, Russia as a persistent but secondary adversary, North Korea and Iran as acute regional disruptors, and growing instability in the Western Hemisphere. It responds by organizing U.S. defense planning around four lines of effort centered on homeland defense, denial in the Indo-Pacific, allied burden-sharing, and industrial revitalization.
The coherence of the National Defense Strategy is not accidental. It reflects the maturation—and political transformation—of a line of strategic thinking most closely associated with Elbridge Colby, who today serves as the U.S. undersecretary of defense for policy, the Defense Department’s chief strategist and third-ranking official.
Colby occupies an unusual position in modern Washington. He was the lead official behind the 2018 National Defense Strategy, later systematized its logic in his provocative book The Strategy of Denial, and then returned to government in Trump 2.0 to oversee the drafting and implementation of the 2026 strategy. Few officials have shaped U.S. defense thinking so directly across diagnosis, theory, and implementation.
That continuity gives the 2026 strategy a clarity that is rare in American defense policy. It also reveals how ideas change under political pressure. The new document carries forward Colby’s denial-based framework but applies it through a distinctly Trumpist lens—shaped less by formal theory than by instinctive nationalism, territorialism, and power politics.
What began as an effort to discipline U.S. overextension has become a governing doctrine that tolerates less ambiguity, imposes sharper expectations, and narrows the space for maneuver, particularly for allies situated along the Indo-Pacific’s most contested frontiers.
U.S. President Donald Trump (center) in a meeting with military leaders in Washington on Oct. 23, 2018. Win McNamee/Getty Images
The 2018 National Defense Strategy (NDS) marked a genuine turning point in U.S. defense thinking. For the first time since the early post-Cold War period, it stated unambiguously that interstate strategic competition, rather than terrorism, had become the central organizing problem of Washington’s defense planning. China and Russia were identified as revisionist powers seeking to reshape regional orders and constrain the choices of others. The document emphasized eroding U.S. military advantage, contested domains, and the reality of finite resources.
Yet the 2018 NDS was also deliberately incomplete. Even as it stressed prioritization, it affirmed the need to maintain favorable balances of power across multiple regions. The Indo-Pacific was elevated, but Europe, the Middle East, and the Western Hemisphere all remained core theaters. Alliances were described as the United States’ durable asymmetric advantage, and reassurance remained central. The strategy named the problem while deferring........