The war has opened a second choke point.
Yemen’s Iran-aligned Houthis said Monday they were imposing a naval blockade on Saudi Arabia, turning the Bab el-Mandeb Strait into the newest pressure point in a conflict already strangling traffic through the Strait of Hormuz. The announcement does not yet prove that all ships are physically blocked from the waterway, but it marks a dangerous new phase: Iran’s allies are now threatening the Red Sea gateway at the same time the Gulf is already under severe stress.
That is why this story is being underpriced.
The world has been watching Hormuz, Kuwait, U.S. strikes on Iran and missile exchanges across the Gulf. Bab el-Mandeb looked like the secondary theater. It is not. It is the southern entrance to the Red Sea, the route ships must pass to reach the Suez Canal from the Indian Ocean. When that corridor becomes unsafe, trade between Asia, Europe and the Mediterranean begins to reroute around Africa, adding time, cost, insurance risk and pressure to already strained supply chains.
Houthi military spokesman Yahya Saree said the maritime ban against Saudi Arabia was effective immediately. A senior Houthi media official said the Bab el-Mandeb Strait would be closed to Saudis in response to what the group called Riyadh’s blockade of Yemen. AP reported that the Houthis gave few details on how the embargo would work, which leaves the immediate operational picture unclear.
But markets and shipping companies do not wait for perfect clarity in a missile zone.
A declared blockade can become real through fear before it becomes real through enforcement. If shipowners, insurers and charterers decide Saudi-linked cargo is at risk — or that nearby neutral vessels could be misidentified, hit by debris or caught in a widening naval exchange — traffic can dry up without the Houthis needing to stop every ship. That is the lesson of the Red Sea crisis since 2023: a handful of missiles and drones can force global carriers to redraw maps.
Bab el-Mandeb is not a minor passage. AP described it as the gateway to the Red Sea through which around 12% of world trade usually passes, including roughly a quarter of global container trade moving to and from the Suez Canal. The U.S. Energy Information Administration estimated that oil flows through Bab el-Mandeb reached 5.4 million barrels per day in the first quarter of 2026, with LNG flows at 2.9 billion cubic feet per day.
That volume matters more now because Hormuz is already impaired.
Reuters reported Monday that Iran had pressed the Houthis to close the Bab el-Mandeb gateway if U.S. attacks on Iranian power infrastructure continued. The same report said a full closure of Bab el-Mandeb would reduce global oil supply by 7%, adding to a war-related cut in Gulf shipments already estimated at 10% of global supply.
That is the nightmare scenario for energy markets: two Middle Eastern arteries squeezed at once.
Hormuz is the Persian Gulf’s exit. Bab el-Mandeb is the Red Sea’s southern gate. The first threatens Gulf crude, LNG and tanker movement. The second threatens the Suez route and the Red Sea alternative that Saudi Arabia has relied on through its east-west pipeline to the port of Yanbu. If both are under pressure, the region’s export system stops looking like a network with backups and starts looking like a trap.
Saudi Arabia is especially exposed. When Hormuz becomes dangerous, Riyadh can move crude across the kingdom by pipeline to the Red Sea. That only works if Red Sea shipping remains viable. A Houthi embargo aimed specifically at Saudi Arabia threatens that escape route and puts pressure on the kingdom without requiring a direct Iranian attack on Saudi territory.
The military logic is blunt. Iran does not need to match the U.S. Navy ship for ship. It can widen the geography of risk until every workaround becomes another target. If the Gulf route is dangerous and the Red Sea route is dangerous, the cost of keeping oil moving rises sharply. Even where cargo still moves, freight rates, insurance premiums, delays and uncertainty do the economic damage.
Major carriers have already shown how quickly that calculus changes. Maersk announced in March that it was pausing future Trans-Suez sailings through Bab el-Mandeb on several services because of the deteriorating Middle East security situation, rerouting ships around the Cape of Good Hope. The company also said it had suspended all vessel crossings in the Strait of Hormuz until further notice.
That is the real significance of Monday’s Houthi announcement. It does not have to produce an instant wall across the water. It only has to convince enough carriers that the route is no longer worth the risk.
The timing is no accident. Reuters reported the Houthi move came as the U.S.-Iran war entered another day of strikes and retaliatory attacks, with Washington continuing to target Iran and Tehran signaling interest in diplomacy while the regional fire keeps spreading. The Guardian reported that the Houthi blockade, if enforced, could further strain Saudi Arabia’s economy by cutting off access to Red Sea ports that have become vital while Hormuz remains under pressure.
That is why this may be one of the most important developments of the war.
A Red Sea blockade threat is not just another Houthi statement. It is Iran’s regional strategy showing its full shape. Pressure Hormuz. Pressure Kuwait and Gulf bases. Pressure Saudi Arabia’s Red Sea outlet. Stretch U.S. defenses. Force insurers and shippers to make commercial decisions that Washington cannot fully control.
The U.S. can strike launch sites. It can hit command nodes. It can move warplanes and ships. But it cannot easily force private carriers to sail through a corridor they believe has become a live target zone. That is where asymmetric power becomes economic power.
For now, the careful wording matters: Bab el-Mandeb has not been independently confirmed as fully closed to all shipping. The verified development is narrower but still severe: the Houthis have declared an immediate blockade against Saudi shipping and said the strait will be closed to Saudi vessels. The wider danger is that markets may treat that as the beginning of a broader Red Sea shutdown.
If that happens, this is no longer just a war over Iran.
It becomes a war over the routes that hold global trade together.
Hormuz was already enough to shock energy markets. Bab el-Mandeb brings the Suez system into the same conflict. The first squeezes the Gulf. The second squeezes the Red Sea. Together, they threaten to turn a regional war into a global supply-chain event.
That is the overlooked headline.
Iran’s allies may not have closed the world’s trade routes completely.
But they have just shown they can make the exits disappear one by one.
