April 12, 2026 — Strait of Hormuz: From Iranian Blockade to U.S. Naval Blockade.
Competing Blockades at the World's Most Critical Chokepoint
The Strait of Hormuz now faces the extraordinary situation of competing closure threats from both sides of the U.S.-Iran conflict. Iran has maintained de facto control of the waterway since early March, using IRGC naval forces and mine-laying operations to prevent commercial shipping. Trump's April 12 announcement of a U.S. naval blockade creates an unprecedented dual restriction on the 21-mile-wide passage.
The strait connects the Persian Gulf to the Gulf of Oman and the Arabian Sea. It is the only sea route from the Persian Gulf to the open ocean, making it arguably the most strategically important chokepoint in global energy logistics. Saudi Arabia, Iraq, Kuwait, the UAE, and Qatar all depend on the strait for the vast majority of their oil exports.
Iran's strategic position is formidable. Its coastline extends along the entire northern shore of the strait, with military installations on islands including Abu Musa, Greater Tunb, and Lesser Tunb. The IRGC Navy maintains fast-attack craft, anti-ship missiles, and submarine capabilities specifically designed for asymmetric warfare in the confined waters.
The U.S. Navy's response capability is equally significant but faces different challenges. The Fifth Fleet operates carrier strike groups from Bahrain but must contend with the geography of operating large surface vessels in narrow waters where they are vulnerable to shore-based missile attacks and drone swarms — tactics Iran has refined over decades of preparation for exactly this scenario.
For global energy markets, the dual blockade creates a worst-case scenario: neither side has incentive to unilaterally reopen the strait, and any attempt to force passage risks triggering the full-scale military escalation both sides have been trying to avoid. Alternative export routes — Saudi Arabia's East-West Pipeline and the UAE's Habshan-Fujairah Pipeline — can only bypass approximately 6.5 million bpd, leaving a massive shortfall.