by COL Byron Cadiz, COL T. Marc Skinner, LTC Robert Mayhue, LTC Lori Perkins, LTC Shun Yu. This report, produced by US Army War College Futures research team Axis Insight 2035, represents eight months of rigorous research from October 2024 to May 2025 to answer Mr. Ian Sullivan, TRADOC G2’s pivotal question: How will China, Russia, Iran, and North Korea react to U.S.-led deterrence efforts by 2035? By 2035, it is almost certain that China, Russia, Iran, and North Korea will respond to US deterrence with entanglement, disruptive technology, and persistent coercion. The global landscape is rapidly transforming, characterized by increasing complexity and challenges to U.S. influence. This seismic shift is marked by two key findings, the first encompassed in three threat vectors: 1) an entangled future of situational cooperation and transactional interdependence among China, Russia, Iran, and North Korea which amplifies deterrence challenges; 2) disruptive technology by which the U.S. advantages are severely threatened or lost to adversarial emerging technologies; and 3) persistent coercion consisting of the expansion and exploitation of gray zone activities in which aggression below the level of armed conflict bypasses traditional deterrence. Collectively, these developments forecast that U.S. deterrence is at risk of becoming strategically irrelevant without integrated, adaptive responses across all instruments of power.