How Iran’s 4,000km attempted strike, Tehran’s longest ever, on the US-UK Diego Garcia base in Indian Ocean turned the war upside down overnight

U.S. officials confirmed Wednesday that Iran fired two medium-range ballistic missiles at the remote U.S.-UK military facility in Diego Garcia, an attack attempt that spanned 4,000 kilometers across the Indian Ocean, U.S. officials confirmed Wednesday, The Wall Street Journal and The Washington Post reported. The operation represents a clear violation of Tehran’s previously self-imposed 2,000-kilometer missile range limit and signals a new phase in the regional war, The Wall Street Journal and The Washington Post reported. While the Pentagon reported that one missile malfunctioned in flight and a second was shot down by a Navy SM-3 interceptor, the targeting of a critical logistics hub located far beyond the Middle East suggests a calculated demonstration that Iran is now theoretically placing European capitals in a similar attack radius.

Iran’s 4,000 kilometer offensive

The attempted attack is characterized by unprecedented distance, with Diego Garcia being more than 3,800 to 4,000 kilometers from the Iranian coastline. According to TOI, US officials told The Washington Post that the missiles used were probably of the Khorramshahr-4 class, a liquid-fueled system that can carry a warhead exceeding one tonne. Although Iranian Foreign Minister Abbas Araghchi told India Today last month that the country had limited its missile range to 2,000 km, this operation shows a willingness to use equipment capable of almost twice that.

Why Is Iran’s Attack on Diego Garcia Strategically Important?

Located in the Chagos Archipelago, Diego Garcia serves as a vital logistics and operations center for the United States and the United Kingdom. The base has historically supported heavy bomber missions in Afghanistan and Iraq and currently hosts pre-positioned military equipment for rapid deployment in Asia and Africa. Its isolation in the deep Indian Ocean was previously seen as a safeguard against traditional regional conflicts; but the Washington Post report, published via TOI, states that Iran’s decision to target the region refutes the assumption that distant strategic assets are inaccessible.

Iran’s Missile Arsenal and Reported Range of 2000 km

The Center for Strategic and International Studies (CSIS) states that most of Iran’s operational systems, such as the Sejcil and Ghadr, are within a range of 2,000 km, while reports from Alhurra suggest that the Sejcil series is being developed to reach 4,000 km. Additionally, the Shahab-6 is reportedly in the testing phase with a theoretical range of up to 10,000 km. The Khorramshahr-4 used in this latest attempt has maneuverable reentry capabilities; The Washington Post, as reported by TOI, describes this as a design aimed at making systems like SM-3 more difficult to intercept.

US Navy Intervention and Widening Conflict

The US Navy used an SM-3 interceptor from a destroyer to respond to the incoming threat, but officials have not confirmed whether the response was successful. This escalation follows US and Israeli attacks on Iran on March 28, triggering a broader conflict involving the UAE, Qatar and Saudi Arabia. As the war continued, Iran’s drones and missiles targeted energy facilities in the Gulf, including Kuwait’s Mina Al-Ahmadi refinery, while the United States responded by deploying additional warships and thousands of Marines to the region.

(via TOI entry)