“We Built This For 20 Years”: Iran’s War Playbook

As the Iran–Israel–U.S. conflict grinds into its fourth week with no clear off-ramp, former Western Naval Command chief Vice Admiral Sanjay Jasjit Singh offers a stark assessment: this is a war Iran has been preparing for over two decades—and one it is structurally built to endure.

Speaking in a detailed interview, Singh argues that Iran’s resilience is neither accidental nor improvised. Its military doctrine, reshaped after the Iraq War, rests on two pillars—“active defence” and asymmetric warfare—designed to offset overwhelming Western firepower. Rather than matching strength with strength, Iran has focused on raising the cost of victory for its adversaries, stretching conflict across geography and time.

At the heart of this approach is what Singh describes as “centralised policy, decentralised execution”—a system akin to mission command. Even if top leadership is targeted, operations continue seamlessly. This helps explain why decapitation strikes have failed to cripple Iran’s warfighting capacity. The system was never dependent on a single head; it was designed to function without one.

Equally critical is Iran’s “mosaic defence”—a dispersed, adaptive model that allows units to operate independently while remaining strategically aligned. The result, Singh notes, is visible in the sustained tempo of Iranian retaliation despite heavy attrition. Even after weeks of bombardment, Iran continues to launch coordinated missile and drone strikes, suggesting deep reserves and robust planning.

He points to another key miscalculation: underestimating Iran’s willingness to escalate horizontally. For years, Tehran had warned that any attack on its mainland would trigger retaliation against U.S. bases and allied assets across the region. That doctrine is now being executed, backed by decades of investment in precision weapons and long-range strike capabilities.

Yet the conflict is not without limits. Singh observes that both sides are now locked in a dangerous “game of chicken,” pushing toward escalation while seeking controlled thresholds—what he calls vertical caps on intensity but continued horizontal expansion. The risk is miscalculation, especially in critical chokepoints like the Strait of Hormuz, where even limited disruption can ripple across global energy markets.

For India, the implications are serious but manageable. While energy diversification has reduced dependence on Gulf supplies, the region’s instability still threatens global prices and supply chains. More broadly, Singh highlights a key lesson for Indian defence planners: the speed of technological adaptation. Modern warfare, he stresses, is less about possessing capability and more about how quickly it can be scaled, integrated, and deployed.

“This isn’t just about weapons,” he suggests. “It’s about systems, doctrine, and the ability to evolve under fire.”