China’s aggression in the South China Sea and increasingly aggressive posture toward Taiwan continue to pose a threat to the rules-based order in the Indo-Pacific region. Recognizing the threat posed by Chinese revanchism, Japan, the Philippines, and the United States are working to deepen and better network their alliances. How can these partners better coordinate on a range of issues, including Beijing’s illegal behavior in the East and South China Seas and possible Taiwan contingencies? It is imperative that the three partners deepen strategic, military, and economic coordination to better understand and prepare for the roles each might play in a crisis.