The Bomber Paradox: The B-21, Nuclear Deterrence, and the Risk of Legacy Defense Assumptions

Modern War Institute | Hannah Jude-Smith, Shane Praiswater and Brian Leitzke

The United States military faces a critical strategic dilemma as it integrates the B-21 Raider into a force posture designed to simultaneously deter Russia and China. Holding this advanced stealth bomber in nuclear reserve during a peer conflict risks severely weakening American conventional striking power in highly contested antiaccess and area-denial environments.

Historically, institutional friction within Strategic Air Command during the Korean and Vietnam Wars demonstrated a persistent reluctance to commit strategic bombers to theater commanders. Applying the escalation theories of Thomas Schelling and Robert Powell, however, reveals that aggressively employing these dual-role platforms conventionally actually enhances deterrence by demonstrating resolve. Ultimately, relying on other modernized legs of the nuclear triad—such as the Sentinel intercontinental ballistic missile and low-yield submarine-launched weapons—allows the joint force to fully leverage the Raider's revolutionary conventional capabilities without hollowing out its strategic deterrent or risking inadvertent escalation.

Comment

The doctrinal insistence on holding the B-21 Raider in nuclear reserve underutilises its unique open-architecture systems in high-intensity conventional campaigns. Tying this platform to static deterrence degrades the immediate conventional strike capacity required to penetrate Chinese deep-inland air defence networks. This conventional deficit increases the likelihood of early escalation in a Western Pacific conflict. This forces a reliance on the Trident D5-deployed W76-2 low-yield warhead to achieve theatre-level deterrence.

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