Secretary of State Marco Rubio’s recent Munich Security Conference speech, and much of the reaction to it, focused on the transatlantic alliance. Yet his warning that weak allies ultimately weaken the United States applies even more urgently in the Indo-Pacific, where U.S. strategy increasingly depends on allied endurance.

As Washington deepens military integration with Australia under the Australia, United Kingdom, and U.S. partnership, the central risk is not immediate confrontation with China but alliance erosion: the gradual loss of partner capacity that narrows U.S. options before conflict begins.