Executive Summary
This report examines U.S. extended deterrence policy, which assures allies of U.S. nuclear protection to prevent their own nuclear weapons development. It details regional nuclear capabilities, including Dual-Capable Aircraft and new sea-launched cruise missiles, and discusses how these policies are applied in the Euro-Atlantic and Indo-Pacific regions. The document also highlights congressional oversight and debates regarding these commitments.
Why It Matters
This document is crucial for defense and geopolitical analysts as it outlines the foundational U.S. nuclear deterrence strategy, its regional applications, and the evolving challenges to non-proliferation, directly impacting alliance stability and global security.
Key Takeaways
- U.S. extended deterrence aims to prevent nuclear proliferation by assuring allies of U.S. nuclear protection.
- Recent U.S. policy shifts, like the 2026 National Defense Strategy, suggest allies take more responsibility for their defense, potentially impacting deterrence credibility.
- The U.S. is modernizing regional nuclear capabilities, including F-35 Dual-Capable Aircraft and new sea-launched cruise missiles, to deter adversaries like Russia, China, and North Korea.
- Allies in Europe and the Indo-Pacific are seeking stronger assurances or considering their own nuclear options amid evolving threats and U.S. policy changes.
Strategic Relevance
Extended deterrence is a cornerstone of U.S. national security, directly influencing alliance cohesion, non-proliferation efforts, and the strategic balance against nuclear-armed adversaries. Its credibility is vital for regional stability and preventing further nuclear proliferation.