Houthis Push Toward Control of Yemen’s Red Sea Coast After Seizing Mocha and Bab el-Mandeb Positions
By Daniel Harper | Senior U.S. Military, International Affairs & Geopolitical Correspondent
Yemen’s Iran-aligned Houthis have sharply expanded their position along the Houthis Yemen Red Sea coastline front, seizing the strategic port city of Mocha and advancing into positions around Dhubab, the Hanish Islands and Perim Island at the entrance to the Bab el-Mandeb Strait. The gains have brought the group closer than at any point in years to dominating the Yemeni side of one of the world’s most important maritime corridors.
The advance does not, however, establish that the Houthis securely control every kilometer of Yemen’s Red Sea coast. Front lines remain difficult to verify independently, government forces are preparing to contest some of the newly captured areas, and military control of a port or coastal road does not necessarily mean uncontested control of the surrounding coastline.
That distinction matters because the implications extend far beyond Yemen. The Bab el-Mandeb connects the Red Sea to the Gulf of Aden and the wider Indian Ocean, linking Asian and Gulf trade with the Suez Canal and Europe. Any prolonged threat to that route could affect Saudi oil exports, commercial shipping, insurance costs and an already strained global energy market.
What Have the Houthis Captured Along Yemen’s Red Sea Coast?
The most consequential breakthrough was the capture of Mocha, also spelled Mokha, from forces aligned with Yemen’s internationally recognized government. The historic port lies roughly 80 kilometers north of the Bab el-Mandeb area and gives the Houthis a stronger position along the coastal road running south toward the strait.
The Houthis already controlled Hodeidah farther north, Yemen’s largest Red Sea port and an important economic and logistical center for territory under the group’s administration.
By September 11, four Yemeni government sources told Reuters that Houthi forces had reached Perim, also known as Mayyun, an island inside the Bab el-Mandeb Strait. Government sources also said their forces had withdrawn from Dhubab and that the Houthis had taken the Hanish Islands.
The withdrawals represent a serious setback for the Saudi-backed government coalition, but holding newly captured ground could prove different from taking it. Government forces have signaled plans to regroup and challenge the advance.
Houthis Yemen Red Sea Coastline: Do They Control the Entire Coast?
The answer, based on currently verifiable information, requires caution.
The Houthis now hold or have reportedly entered a string of crucial positions extending from Hodeidah through Mocha and toward the Bab el-Mandeb. Reuters has described their campaign as an attempt to take control of the whole Yemeni Red Sea coast. That objective should not be confused with independently confirmed, uncontested control of every coastal district.
Military geography is rarely that simple. Control can differ between a city center, port facilities, highways, islands, military installations and surrounding high ground. Government units can also withdraw temporarily and later mount counterattacks.
For that reason, the strongest factual description is that the Houthi military advance has brought the movement close to dominating the most strategically important positions along Yemen’s western coastline, while the durability and completeness of that control remain contested.
Why Mocha Matters Far Beyond the Port Itself
Mocha’s importance today has less to do with its famous history as a coffee-exporting center than with geography.
Its capture extends Houthi-controlled territory southward along the Red Sea and improves the group’s position on approaches to Bab el-Mandeb. Across the water lie Djibouti and Eritrea, while commercial traffic traveling between Asia and Europe passes through waters nearby.
Taking Mocha does not give the Houthis automatic command of passing ships. Maritime control depends on far more than possession of a port. But the city provides another coastal foothold from which the group can exert political and military pressure on a corridor already repeatedly disrupted by conflict.
Bab el-Mandeb Is the Real Strategic Prize
The Bab el-Mandeb Houthis confrontation matters because the strait forms the southern gateway to the Red Sea. Ships passing north through it can continue toward the Suez Canal and Mediterranean, making the route essential for trade between Europe and Asia.
At its narrowest, the strait is about 29 kilometers wide and is divided by Perim Island. The Hanish Islands lie farther north, giving their holder strategically valuable positions overlooking approaches to the shipping corridor.
Kpler data cited by Reuters estimated that around 7% of global oil output was moving through Bab el-Mandeb in June. That percentage is not fixed; trade patterns change with security conditions and commercial decisions.
If shipowners conclude that the threat has become unacceptable, vessels can instead sail around Africa’s Cape of Good Hope. That route is considerably longer, raising fuel consumption, transit times and freight costs.
Houthis and Saudi Arabia Enter a More Dangerous Phase
The coastal advance is unfolding alongside direct Houthi pressure on Saudi Arabia.
The group has declared a maritime blockade targeting Saudi shipping and has carried out attacks against Saudi cities and energy-related facilities. Saudi authorities said attacks on September 8 struck or affected locations around Abha, Khamis Mushait, Jazan and Najran and wounded 73 people, including women and children. Those casualty figures are based on Saudi statements.
Readers following the latest Houthi missile attacks on Saudi Arabia will recognize why Riyadh is increasingly concerned about events farther south in Yemen.
Saudi Arabia has become more dependent on its Red Sea export infrastructure as the wider U.S.-Iran conflict disrupts traffic through the Strait of Hormuz. That makes instability near Bab el-Mandeb particularly sensitive for the kingdom.
Saudi Arabia Faces Difficult Choices
Saudi-backed Yemeni forces have requested greater assistance as Houthi units advanced along the coast. Reuters reported that Riyadh had continued providing logistical, intelligence and military support while limiting its air operations, with strikes concentrated primarily on northern fronts including Jawf and Marib.
That matters because there is not yet solid evidence of a successful Saudi-led counteroffensive reversing the Houthi gains around Mocha and Bab el-Mandeb.
Riyadh has competing incentives: prevent the Houthis from entrenching themselves around the Red Sea chokepoint while avoiding an escalation that could provoke further strikes against Saudi population centers and energy infrastructure.
Iran’s Role: Support Does Not Automatically Mean Total Control
The Houthis are closely aligned with Iran, which has provided political backing and, according to U.S., Saudi, Yemeni and regional officials, weapons, funding and military assistance.
Reuters reported this week that Yemeni, Iranian and regional sources described Revolutionary Guard guidance and assistance during the latest offensive. Iranian officials, however, have publicly rejected the characterization of the Houthis as a proxy under Tehran’s direct control, and one Iranian source said the decision to advance on Mocha was made by the Houthis themselves.
The distinction is important. Iranian assistance can increase Houthi capabilities without proving that Tehran personally directs every battlefield decision, missile launch or territorial operation.
Yemen Is Becoming Another Front in the U.S.-Iran Conflict
The timing gives the offensive broader geopolitical weight.
Traffic through the Strait of Hormuz has fallen sharply during the U.S.-Iran confrontation. Preliminary shipping data cited by Reuters showed only seven vessel transits through Hormuz on September 10, far below levels before the current war. Meanwhile, Bab el-Mandeb traffic had remained much closer to its recent average.
A simultaneous security crisis around both Hormuz and Bab el-Mandeb would therefore place pressure on two separate maritime gateways used by Middle Eastern energy exporters.
That does not mean Iran controls either waterway. It means Iran and aligned groups could gain additional strategic leverage if commercial shipping perceives both corridors as increasingly hazardous.
Houthi Red Sea Shipping Threat Could Raise Costs Worldwide
The effect on Houthi Red Sea shipping does not require a formal closure of Bab el-Mandeb.
Previous Houthi attacks on commercial vessels caused large shipping operators to divert vessels away from the Red Sea. Similar decisions now would mean longer voyages, additional fuel consumption, higher insurance premiums, tighter vessel availability and potential delays for supply chains connecting Asia, the Middle East and Europe.
The risk builds on the growing Houthi threat to the Yemen Red Sea shipping route, where security concerns have already influenced commercial routing decisions.
A vessel does not need to be attacked for costs to rise. Insurers and shipping companies price the probability of an incident, and even an elevated perceived threat can alter routes.
What Could the Houthi Advance Mean for Oil Prices?
Oil markets are already absorbing several overlapping risks rather than reacting to the Yemen battlefield alone.
Brent crude surged above $100 this week as traders evaluated tanker attacks, restricted Hormuz traffic, Houthi attacks on Saudi energy targets and the seizure of Mocha. Prices later retreated from Friday’s four-month high but remained sharply higher for the week.
It would be misleading to attribute that move solely to Houthi territorial gains. Energy markets are responding to the combined possibility of lost production, damaged infrastructure, shipping delays and disruption at multiple maritime chokepoints.
Saudi vulnerability is especially relevant. The International Energy Agency said Saudi crude supply fell sharply in August after attacks affecting energy facilities and shipping, although the agency’s assessment differed from Saudi figures reported to OPEC.
Could the Houthis Actually Close Bab el-Mandeb?
Holding territory near the strait is not the same as exercising complete control over maritime traffic.
The security balance depends on many factors, including surveillance, missiles and drones, coastal weapons, mines, islands, naval capabilities, air power and the presence of international forces. Commercial vessels also operate across waters that cannot be controlled simply by capturing one coastal city.
Yet physical closure is not necessary to produce economic damage. Repeated attacks, credible threats or uncertainty around shipping lanes can be sufficient to make companies avoid the area.
What the Offensive Means for Yemen’s Civil War
The territorial changes also threaten the relative lull that followed Yemen’s 2022 truce.
Years without sustained fighting on the scale seen earlier in the civil war allowed front lines to harden. The new Houthi offensive and government plans for a counterattack raise the possibility of renewed ground combat, displacement, infrastructure damage and additional economic pressure on civilians.
Internal divisions among anti-Houthi groups remain another complication. Even with outside assistance, reclaiming territory could prove difficult if Saudi-backed factions cannot coordinate their military and political objectives.
Could Yemen Become a Wider Regional Battlefield?
The danger is the interaction of several conflicts rather than an inevitable march toward a single regional war.
Iranian support for the Houthis, Houthi attacks on Saudi Arabia, U.S.-Iran hostilities and threats to international shipping now overlap geographically. A serious strike on a commercial ship, Saudi energy site or foreign naval vessel could prompt retaliation and create another cycle of escalation.
That does not prove every action is centrally coordinated. Different actors have their own interests, command structures and political calculations.
What Happens Next?
Houthi consolidation: The Houthis could focus on securing Mocha, Dhubab, nearby islands and coastal roads while strengthening their political leverage around Bab el-Mandeb.
Saudi-backed counteroffensive: Yemeni government forces could regroup with outside support and attempt to retake strategically important coastal positions.
Bab el-Mandeb confrontation: Fighting closer to the strait could increase perceived risks for tankers and container ships even without a formal blockade.
Diplomatic pressure: Regional governments and international mediators could seek a new arrangement to prevent Yemen’s renewed fighting from spreading into the maritime domain.
These are scenarios rather than predictions. The next phase will depend heavily on whether the Houthis can hold territory captured during their rapid advance and whether their opponents decide that reversing those gains is worth the military and economic risks.
The Strategic Question Now Facing the Red Sea
The central issue in the Houthis Yemen Red Sea coastline story is no longer simply who controls Mocha. The greater question is whether the Houthis can turn a series of rapid territorial gains into lasting leverage over Yemen’s western coast and the approaches to Bab el-Mandeb.
That matters to Yemen’s future, Saudi security, Iran’s regional strategy, U.S. military planning and the movement of energy and manufactured goods between Europe and Asia.
The question now is whether the Houthis can consolidate those coastal gains without triggering a broader confrontation around one of the world’s most important maritime chokepoints.
