US-Iran War SITREP: Escalating Strikes, CSAR Clashes, and Gulf Infrastructure Hits — April 4, 2026

The US-Iran conflict has entered a critical phase of escalation, marked by direct military engagements across multiple fronts. Following the downing of a US F-15E fighter jet in Iran's Khuzestan province, US special forces are engaged in ongoing combat search and rescue (CSAR) operations inside Iranian territory, resulting in clashes with IRGC and Basij forces. President Trump has issued a 48-hour ultimatum for Iran to cease hostilities and reopen the Strait of Hormuz, threatening severe retaliation against energy infrastructure. In response, Iran has launched widespread missile and drone strikes targeting Israeli, Kuwaiti, Bahraini, and UAE assets, including oil refineries, power plants, and military sites, causing significant damage and fires. Israeli forces have conducted over 200 airstrikes on Iranian and Hezbollah targets, hitting petrochemical complexes, air defenses, and weapons storage, with reported casualties exceeding 200 in Iran alone. Proxy actions by pro-Iranian militias in Iraq and Houthi forces in Yemen have intensified, including joint attacks on Israeli airports. Humanitarian impacts are severe, with border closures in Syria and Lebanon, asset seizures in Iran, and disruptions to global shipping. Political opposition to the war grows domestically in the US, while international calls for de-escalation, including from the Pope and former IAEA chief, highlight risks of regional conflagration. US munitions stockpiles show signs of strain, with recent deployments of 2025-dated JASSM missiles, and commercial satellite imagery has been restricted by government request, complicating open-source intelligence. Iran's rejection of the ultimatum and vows of 'big surprises' underscore a volatile standoff, with potential for broader involvement of Gulf states.