Coercing Syria on Chemical Weapons: A Case Study of Deterrence and Coercive Diplomacy

Why It Matters

The analysis reshapes how policymakers design deterrence and compellence strategies, highlighting that misreading a target’s priorities can render even the strongest threats ineffective.

Key Takeaways

• Deterrence failed when Assad prioritized regime survival.
• Compelling Syria to surrender weapons succeeded with Russian backing.
• Assurances of power retention outweigh threat credibility.
• ‘Resolve plus bombs’ formula insufficient without motivation targeting.
• Future coercion must balance threats, assurances, and target motives.

Pulse Analysis

The Syrian civil war became a litmus test for the international non‑proliferation regime, as repeated chlorine and sarin attacks exposed the limits of conventional deterrence. From Obama’s 2012 “red line” to Trump’s retaliatory strikes, U.S. officials repeatedly relied on the credibility of punitive airpower, assuming that a credible threat would dissuade further chemical use. Yet the Syrian leadership, entrenched in a survivalist mindset, repeatedly calculated that the benefits of retaining power outweighed the risks of limited strikes, rendering the “resolve plus bombs” formula largely ineffective.

Moran, Bowen, and Knopf argue that a more nuanced approach—one that foregrounds the target’s motivations and offers concrete assurances—could have altered outcomes. Russia’s diplomatic backing proved pivotal in convincing Assad to surrender a substantial portion of his arsenal and sign the Chemical Weapons Convention, demonstrating that guarantees of regime continuity can outweigh the fear of retaliation. Conversely, the Trump administration’s focus on counter‑terrorism threats diluted the pressure on Assad, allowing a resurgence of chemical attacks until a decisive strike re‑established a fragile deterrent posture. The authors’ critique underscores that credibility alone is insufficient; policymakers must calibrate threats with incentives aligned to the adversary’s core interests.

For future coercive diplomacy, the book’s insights suggest a strategic shift: integrate threat credibility with tailored assurances that directly address the adversary’s primary concerns—often political survival or territorial control. This balanced framework can reduce the risk of escalation while enhancing compliance, a lesson applicable beyond Syria to other WMD‑related crises. By internalizing these dynamics, U.S. and allied decision‑makers can craft more resilient, outcome‑oriented policies that safeguard both security and non‑proliferation goals.