Tokyo, Seoul and Manila confront the same magazine deficits, supply-chain vulnerabilities, and exposure to Chinese missile depth that afflict the United States. The organising concept is indivisible security; that is, the security of one state cannot be purchased at the expense of another. Structural eviction of the United States simply clears space for a geopolitical correction long in the making. An ASEAN-curated architecture grounded in indivisible security offers a realistic exit from the trap of great-power war. What Asian security looks like in the coming decades is something the states of the region can shape directly.