Security Council Mechanism and the Strait’s Strategic Importance
The Strait of Hormuz is a narrow waterway connecting the Persian Gulf to the Gulf of Oman. Its northern shore is Iran; to the south lie the Musandam Peninsula of Oman and a portion of the United Arab Emirates. It is the only sea passage out of the Persian Gulf to the open ocean, making it one of the world’s most strategically vital choke points. A large share of globally traded liquefied natural gas and seaborne oil passes through it each year. The waterway is also the sole maritime route for several Gulf countries, including Iraq, Kuwait, Bahrain, Qatar, and the United Arab Emirates.
The United Nations Security Council, under its Chapter VII powers, can determine that a closure constitutes a threat to international peace and authorize responses ranging from sanctions to military action. Any such resolution would be subject to the veto of the council’s five permanent members: the United States, United Kingdom, France, Russia, and China. What to watch next centers on whether the Security Council convenes in emergency session and what language any resolution might contain.
Military Preparations and Historical Precedent
The U.S. Fifth Fleet, based in Bahrain, maintains the capability to conduct mine-clearing operations and escort convoys through the strait. That mission would mirror Operation Earnest Will, the 1987-1988 U.S. reflagging and escort operation in the Persian Gulf during the Iran-Iraq War. The Pentagon has already positioned assets in the region; the USS Dwight D. Eisenhower carrier strike group was deployed to the area as of early 2025, according to defense officials.
The historical record provides a cautionary precedent. The 1988 U.S.-Iran naval clashes demonstrated how a confrontation in the strait can escalate into broader conflict. During Middle Eastern conflicts before the 2026 Iran War, the strait had never been closed for an extended period. But Iran repeatedly threatened to shut it down, and preparations to mine the waterway were undertaken. More recently, the 2026 Iran War saw Iranian blockades that actually closed the strait, triggering what became known as the 2026 Strait of Hormuz crisis.
Iran’s Supreme Leader, Ayatollah Ali Khamenei, holds final authority over any military action, including a decision to close the strait. That concentration of command authority means any response planning must account for the direct involvement of Iran’s top leadership.
Diplomatic and Economic Contingencies
Diplomatic options remain on the table alongside military preparations. The 2015 Joint Comprehensive Plan of Action, known as the JCPOA, could serve as a framework for renewed negotiations. The United States withdrew from that agreement in 2018. Sources familiar with regional diplomacy have also pointed to Oman or Qatar as potential mediators for new talks. The International Maritime Organization could issue navigational warnings to shipping traffic.
Oil-importing nations heavily dependent on Persian Gulf crude face a distinct set of pressures. Japan, South Korea, and India rely significantly on oil transiting the Strait of Hormuz. Those countries may call for emergency releases from strategic petroleum stockpiles coordinated through the International Energy Agency. Europe also depends on the route for a significant portion of its energy supplies.
Any disruption to shipping through Hormuz can cause severe supply shortages for energy-dependent economies. The strait’s centrality to global energy security means that events there carry consequences far beyond the region, potentially drawing in the United Nations Security Council, allied naval forces, and international economic coordination mechanisms in overlapping responses.
