U.S. Joins Fifth Iteration of Chilean Exercise Resolute Sentinel at Cerro Moreno Air Base
Resolute Sentinel sits at the intersection of two competing pressures: U.S. industrial surge in the Americas (AUKUS co-production, allied procurement acceleration) and the withdrawal of committed NATO forces. South America — particularly Chile's strategic position on Pacific approaches — becomes a hedge against overcommitment in Europe and the Indo-Pacific.
If the exercise includes cyber or space defense modules, it signals SOUTHCOM is building redundancy in command-and-control architecture that does not depend on Atlantic-centric NATO infrastructure. The timing (early July, before the FYDP reprogram cycle) suggests the exercise may also serve as a test bed for new interoperability standards that will be codified in FY27 procurement guidance.
Routine multilateral air exercises like Resolute Sentinel sustain interoperability muscle memory across the Americas at a moment when U.S. defense commitments are contracting elsewhere.
The U.S. formally reduced its NATO force pool in May 2026 — a signal that regional allies cannot assume automatic U.S. presence. This exercise demonstrates that SOUTHCOM maintains continuous training integration with Chile and other Western Hemisphere partners, anchoring a persistent U.S. footprint in a region where China has been expanding Arctic research operations and infrastructure investment. Watch whether the exercise agenda includes anti-access/area-denial (A2/AD) scenarios or explicit Taiwan Strait contingency planning — that would signal SOUTHCOM is preparing for force-rationing in the Indo-Pacific.
Does the exercise include live-fire or anti-ship components, and which nations beyond the U.S. and Chile are participating? The DoD announcement omits force composition and scenario details.
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