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Red Sea crisis

Houthi involvement in the Gaza war

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Through Crisis, United Kingdom and United Nations Security Council

Since 2014, the Houthi-led Supreme Political Council, who oppose the Saudi-backed government of Yemen and receive support from Iran, have controlled a considerable swath of the country's western territories, including most of the national Red Sea coastline. Shortly after the outbreak of the Gaza war, the Hamas-allied group began to launch missiles and drones at Israel. It has also fired on merchant vessels in the Red Sea, particularly in the Bab-el-Mandeb, the southern maritime chokepoint of the Red Sea (the northern chokepoint being the Suez canal), inflicting damage on the global economy. The group declared that it would not stop until Israel ceased military operations in Gaza.

The Houthis declared any Israel-linked ship was a target for attack, including US and UK warships, but they also attacked the ships of nations with no connection to Israel. The Houthis have attacked 178 vessels throughout their two-year blockade, according to the NGO Armed Conflict Location and Event Data, sinking four ships and killing nine sailors. To avoid being attacked, hundreds of commercial vessels were rerouted to sail around South Africa.

Houthi Red Sea attacks have drawn military responses from a number of countries. In January 2024, the UN Security Council adopted Resolution 2722, condemning the Houthi attacks and affirming freedom of navigation. The United States-led Operation Prosperity Guardian was launched to protect Red Sea shipping. From 12 January 2024, the US and UK led coalition air and missile strikes against the Houthis, while other countries are independently attacking Houthi vessels in the Red Sea. On 3 May 2024, Yemeni general Yahya Saree said, "We will target any ships heading to Israeli ports in the Mediterranean Sea in any area we are able to reach". On 6 May 2025, US president Donald Trump announced a cessation of US strikes as a result of a bilateral ceasefire between the US and the Houthis. The Houthis halted their attacks on international shipping and on Israel after the Gaza peace plan went into effect on 10 October 2025. Some major shipping corporations, such as Maersk, have since resumed their Red Sea routes, while others have held off due to the volatile situation. As of May 2026, daily traffic through the strait was around 31 ships per day, as it had been since January 2024, remaining below the pre-war level of 75 ships per day.

During the war on Iran by the United States and Israel, the Houthis threatened to escalate the conflict on 28 February 2026. A month later on 28 March, the Houthis resumed their attacks on Israel amidst the war against Iran. On 13 July, the group resumed its attacks against Saudi Arabia and by 20 July, they announced a blockade of Saudi Arabian ports and ships in the Bab-el-Mandeb in response to the ongoing Saudi-led intervention and blockade against Houthi-controlled Yemen. On 30 July 2026, Saudi Arabia, Turkey, Pakistan, Egypt, Bahrain, Qatar, Jordan, Kuwait, Bangladesh, Djibouti, Somalia, Yemen, Sudan, and Comoros formed the Multinational Maritime Defense Alliance to ensure the freedom of navigation through the Bab-el-Mandeb Strait, the Red Sea, and the Gulf of Aden.

Background

Houthis within Yemen

The Houthi movement is an Iran-backed Zaydi Shia Islamist militant organization that exercises control over parts of Yemen, though it is not the country's internationally recognized government. The Houthi takeover in Yemen in 2014 resulted in the group's acquisition of the capital city of Sanaa, but the anti-Houthi Presidential Leadership Council remains recognized by the international community as Yemen's legitimate government.

After this conflict grew into an ongoing civil war, millions of residents were internally displaced, and a Saudi-led coalition responded by imposing a blockade of Yemen. These combined to shrink the economy by half and contributed to famine in Yemen since 2016, one of the worst in the world. The US military destroyed drones in Yemen's Houthi-held region and over the Red Sea due to perceived threats, exacerbating tensions in the conflict-ridden area. This comes amidst ongoing attacks by the Houthis and challenges to diplomatic efforts to end the Yemeni war.

Houthis and the Gaza war

Following the Hamas-led attack on Israel on 7 October 2023, which triggered the Gaza war, numerous Iran-backed militant groups across the Middle East (including the Houthis) expressed support for the Palestinians and threatened to attack Israel. Houthi leader Abdul-Malik al-Houthi warned the United States against intervening in support of Israel, threatening that such an intervention would be met with retaliation by drone and missile strikes. In order to end their attacks in the Red Sea, the Houthis demanded a ceasefire in the Gaza war and an end to the accompanying Israeli blockade of the Gaza Strip.

Weapons used by Houthi militants

According to Armament Research Services, Houthi weapons are mostly of Russian, Chinese or Iranian origin. They are known to use surface-to-surface missiles, artillery rockets, loitering munitions and unmanned aerial vehicles (UAVs). They have several missiles and UAVs capable of reaching Israel from Yemen:

  • Toufan – a surface-to-surface missile, with a range of 1,800 km (1,100 mi).
  • Cruise missiles – from the Iranian Soumar family, with strike ranges of about 2,000 km (1,200 mi).
  • Quds-2 missile – supposedly with a range of 1,350 km (840 mi) but made to strike Israel.
  • Samad-3 and Samad-4 – UAVs/loitering munitions with ranges of 1,800 km (1,100 mi) and further.
  • Wa'id drones – similar to Iran's Shahed 136, loitering munition with a range of 2,500 km (1,600 mi).
  • Naval drones – 7 metres (23 ft) unmanned surface vessels (USVs) laden with explosives.

Strait of Bab-el-Mandeb

The Bab-el-Mandeb Strait connects the Red Sea with the Gulf of Aden and the Indian Ocean and is therefore considered a trade artery. The corridor handles nearly 10% of global trade and roughly 5%-7% (approximately 6%) of global oil shipments. Threats and attacks can cause major shipping disruptions, forcing commercial vessels and oil tankers to avoid the route and reroute around Africa's Cape of Good Hope, adding weeks of travel time and higher costs.

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