Iran's Islamic Revolutionary Guard Corps (IRGC) is utilizing the Khorramshahr-4 medium-range ballistic missile to bolster its regional deterrence capabilities [1, 2].

This deployment signifies a strategic effort by Tehran to demonstrate that U.S. bombing campaigns cannot fully neutralize its missile arsenal [1, 3]. By maintaining these assets in hardened underground facilities, Iran seeks to preserve its ability to strike critical maritime corridors and foreign military installations.

The Khorramshahr-4 is described as a heavy-warhead missile. Reports on its specific payload capacity vary between 1.5 and two tons [1, 3]. This high capacity allows the missile to deliver significant destructive power over a medium-range distance. While some reports do not specify the exact range of the Khorramshahr-4, related Iranian missile systems have been cited as having a strike power of approximately 700 km [4].

Intelligence indicates that Iran has successfully maintained the operational status of its launch infrastructure. Of 33 identified missile sites, 30 remain operational [2]. These sites are strategically positioned to target the Strait of Hormuz, a vital artery for global oil shipments, and other regional adversaries.

In one specific instance, the missiles were positioned to target the U.S.-U.K. base on Diego Garcia in the Indian Ocean [1, 5]. This positioning extends Iran's reach beyond its immediate borders, putting European interests and distant military hubs on notice [5].

The IRGC's reliance on underground tunnels is a core component of its survival strategy. These facilities are designed to protect missiles from aerial strikes and ensure that the arsenal remains viable even after an initial wave of attacks [1]. The continued operation of these sites suggests a sophisticated level of infrastructure resilience that complicates U.S. and allied military planning in the region.

Iran's IRGC is utilizing the Khorramshahr-4 medium-range ballistic missile to bolster its regional deterrence capabilities.

The persistence of 30 out of 33 missile sites indicates that Iran's 'missile cities' are largely resilient to external degradation. By pairing high-payload warheads with underground launch capabilities, Tehran is shifting from a purely defensive posture to a credible deterrent strategy that can threaten both regional chokepoints like the Strait of Hormuz and remote strategic assets like Diego Garcia.