Houthis (Ansar Allah) – IFC Terrorist Groups Library
Iran-Backed Militant Organisation  ·  Founded 1992

The Houthis

Ansar Allah — "Supporters of God" in Arabic — commonly known as the Houthis, is a Yemeni Zaydi Shia Islamist movement and the dominant armed force in northwestern Yemen, including the capital Sanaa. Originating as a religious and political revival movement in the 1990s, the group evolved into an armed insurgency following the killing of its founder, Hussein Badreddin al-Houthi, by Yemeni government forces in 2004. After a decade of on-and-off civil conflict, the Houthis seized Sanaa in September 2014 and triggered a catastrophic regional war when a Saudi-led coalition intervened in 2015. Backed militarily and financially by Iran as a core node of the so-called "Axis of Resistance," the group controls territory home to roughly 70% of Yemen's population and has transformed itself into a conventional military-political actor capable of launching ballistic missiles, cruise missiles, and armed drones at targets across the Arabian Peninsula and, from late 2023, at commercial and naval shipping throughout the Red Sea. Designated a Foreign Terrorist Organisation by the United States in 2025, the Houthis represent the most destabilising Iran-backed non-state actor in the Middle East.

Iran-Backed Zaydi Shia Islamist Middle East Desk Yemen Red Sea De Facto Governing Authority
Founded
1992
Established as Believing Youth forum; armed insurgency began 2004
Est. Fighters
150,000–200,000
Controls conventional military, missile, and drone forces in northwestern Yemen
Iranian Support
$100M+/yr
Weapons, training, intelligence, and financial transfers via IRGC Quds Force
Territory
~70% of population
Controls Sanaa, Hodeidah, and most major population centres in the north

History & Founding

The Houthi movement traces its origins to 1992, when Hussein Badreddin al-Houthi founded the Believing Youth (Muntada al-Shabab al-Mu'min) as a cultural and religious organisation in the Saada governorate of northwestern Yemen. The group sought to revive Zaydi Shia Islam — a minority sect historically dominant in the region — in the face of encroaching Salafi and Sunni Islamist influence promoted by Saudi-funded institutions inside Yemen. Throughout the 1990s, the movement attracted tens of thousands of young followers across northern Yemen and developed a distinctly anti-American and anti-Israeli political identity.

The turning point came in 2003–2004. As anger over the US invasion of Iraq swept the Arab world, Hussein al-Houthi and his followers began openly challenging the government of President Ali Abdullah Saleh, accusing it of being a tool of American imperialism. The Yemeni government launched a military campaign against the group in June 2004. Hussein al-Houthi was killed in September 2004, transforming him into a martyr and cementing the movement's militant trajectory under the leadership of his father, Badr al-Din al-Houthi, and later his brother, Abdul-Malik al-Houthi, who has led the group ever since.

"God is great, death to America, death to Israel, a curse upon the Jews, victory to Islam."

Houthi Movement Slogan, adopted after 2003

Between 2004 and 2010, the Houthis fought six rounds of war against the Yemeni government — conflicts that drew in Saudi Arabia, which launched its own cross-border offensive, Operation Scorched Earth, in 2009. The group survived each campaign, expanding its military capacity and territorial footprint in Saada and adjoining governorates. When the Arab Spring destabilised the Saleh government in 2011, the Houthis capitalised on the resulting power vacuum. Allying opportunistically with their former enemy, ex-president Saleh, the Houthis swept south from their Saada stronghold, reaching Sanaa in September 2014 and seizing the capital entirely by January 2015.

The seizure of Sanaa prompted the Saudi-led coalition to intervene in March 2015, launching Operation Decisive Storm. A decade of war followed: over 150,000 people killed — including more than 14,500 civilians directly — and what the United Nations has described as one of the world's worst humanitarian catastrophes, with millions pushed to the brink of famine. Despite the coalition's overwhelming air superiority and a comprehensive naval blockade, the Houthis consolidated control over northwestern Yemen and steadily developed their missile and drone arsenal — supplied and upgraded by Iran's Islamic Revolutionary Guard Corps — to strike deep into Saudi Arabia and the UAE.

Timeline

  • 1992
    Hussein Badreddin al-Houthi founds the Believing Youth (Muntada al-Shabab al-Mu'min) in Saada, Yemen, as a Zaydi religious and political revival movement opposing Salafi influence and growing ties between the Yemeni government and Washington.
  • 2004
    Yemeni government launches military campaign against the group. Hussein al-Houthi is killed in September, becoming a martyr figure. His brother Abdul-Malik al-Houthi assumes leadership and intensifies the armed insurgency.
  • 2009–2010
    Saudi Arabia launches Operation Scorched Earth against Houthi forces in border areas after cross-border incursions. The Houthis fight Saudi forces to a standstill, demonstrating a growing capacity to absorb and repel a conventional military superpower in the region.
  • 2011–2012
    Arab Spring destabilises President Saleh's government. The Houthis expand southward out of Saada during the political vacuum. They emerge from the National Dialogue Conference as a recognised political actor while simultaneously expanding military control.
  • 2014–2015
    Houthis seize Sanaa in September 2014, dissolve Yemen's parliament, and place President Abd-Rabbuh Mansur Hadi under house arrest. Hadi escapes to Aden and then Saudi Arabia. Saudi-led coalition launches airstrikes in March 2015, beginning a decade-long war.
  • 2017
    Houthis fire ballistic missile at Riyadh's King Khalid International Airport — the first time a rebel group in the Arabian Peninsula had struck the Saudi capital. The Houthis also assassinate former ally Ali Abdullah Saleh after he attempts to break with the movement, consolidating their dominance in Sanaa.
  • 2019
    Coordinated drone and cruise missile attack strikes Saudi Aramco oil processing facilities at Abqaiq and Khurais, briefly cutting Saudi oil output by half. The Houthis claim responsibility; the US and Saudi Arabia attribute ultimate responsibility to Iran. The attack demonstrates the transformative reach of Iran-supplied precision strike capability.
  • 2022
    Houthi drone strikes kill three people and wound six at the Abu Dhabi National Oil Company fuel depot and near Abu Dhabi International Airport — the first successful Houthi attack on the UAE. A UN-brokered truce takes hold in April, the most durable pause in fighting of the war, though the Houthis continue consolidating control.
  • 2023–2024
    Following the outbreak of the Israel-Gaza war in October 2023, the Houthis launch a sustained campaign of drone and missile attacks on commercial shipping in the Red Sea, disrupting one of the world's busiest trade routes. Over 100 vessels are attacked; multiple ships are seized or sunk. The US and UK launch retaliatory strikes on Houthi military infrastructure inside Yemen.
  • 2025
    The United States re-designates Ansar Allah as a Foreign Terrorist Organisation. Houthi attacks on Red Sea shipping continue; the group launches ballistic missiles and drones targeting Israel on multiple occasions, framing the campaign as solidarity with Palestinians in Gaza.

Ideology & Structure

The Houthis are rooted in Zaydi Shia Islam — a moderate branch of Shia Islam historically dominant in northwestern Yemen — but under Abdul-Malik al-Houthi's leadership have grafted onto it a revolutionary political ideology heavily influenced by the Islamic Republic of Iran and Lebanon's Hezbollah. The result is a hybrid doctrine that combines Yemeni religious nationalism with anti-American and anti-Israeli pan-Islamic revolutionary politics. The group's slogan — "God is great, death to America, death to Israel, a curse upon the Jews, victory to Islam" — captures this fusion of Islamist populism and Iranian-style resistance ideology.

Unlike al-Qaeda and ISIS affiliates that pursue transnational caliphate projects, the Houthis are fundamentally a state-capture organisation. Their primary objective has been to seize and govern Yemeni territory — a project substantially achieved in the north. In areas under their control, the Houthis run a parallel government: collecting taxes and customs revenues, operating courts and prisons, conscripting fighters, managing ports, and administering public services. This governance capacity, combined with their demonstrated willingness to use extraordinary violence against dissent, has made them the most entrenched armed actor in Yemen despite a decade of Saudi-led counter-insurgency.

"The Houthis are not just a militia. They are a state in the making — with bureaucracies, tax systems, military hierarchies, and an ideology capable of mass mobilisation."

International Crisis Group, Yemen Analysis, 2023

The Houthis maintain a deeply repressive internal governance regime. In areas they control, political opposition is crushed; journalists, civil society activists, and perceived dissidents are routinely arrested, tortured, and disappeared. The group forcibly conscripts fighters, including boys as young as 15. It imposes severe restrictions on women's movement and employment. Ethnic and religious minorities — particularly the Baha'i community — face systematic persecution, with members imprisoned and, in some cases, sentenced to death on charges of apostasy and espionage.

Organisationally, the Houthis are structured around Supreme Leader Abdul-Malik al-Houthi, who exercises near-absolute authority. Below him are a Supreme Political Council, military commanders, provincial governors, and a deep network of tribal and religious networks embedded across northwestern Yemen. The IRGC Quds Force provides weapons systems — including ballistic missiles, anti-ship missiles, armed drones, and naval mines — as well as training and intelligence support, integrating the Houthis into Iran's broader regional proxy network alongside Hezbollah, Hamas, and Iraqi Shia militias.

Major Attacks & Operations

The Houthis have conducted thousands of attacks since 2004, ranging from ground offensives and artillery bombardments to sophisticated precision drone and missile strikes on regional capitals, critical infrastructure, and international shipping lanes. Their operational reach has expanded dramatically with Iranian military support, transforming a local insurgency into a regional strategic threat.

Riyadh Airport Missile Strike
November 2017  ·  Riyadh, Saudi Arabia
Ballistic missile fired at King Khalid International Airport — the first direct strike on the Saudi capital by a non-state actor. Saudi air defences intercept the missile, but the attack demonstrates the unprecedented reach of Iran-supplied weaponry.
Abqaiq & Khurais Oil Strike
September 2019  ·  Eastern Saudi Arabia
Coordinated cruise missile and drone attack on Saudi Aramco facilities cuts global oil output by 5%. The Houthis claim responsibility; the US attributes planning to Iran. The attack is the most damaging strike on energy infrastructure in history.
Abu Dhabi Drone Attacks
January 2022  ·  Abu Dhabi, UAE
Drone strikes on ADNOC fuel depots and near Abu Dhabi airport kill three people. First successful Houthi strike on the UAE, demonstrating 1,500km+ operational range and capacity to target Gulf economic capitals.
Red Sea Shipping Campaign
November 2023–Present  ·  Red Sea / Gulf of Aden
Over 100 commercial vessels attacked with anti-ship missiles, drones, and naval mines. Multiple ships seized or sunk. Triggers 60%+ drop in Suez Canal traffic; forces global shipping rerouting around Africa at enormous economic cost.
Galaxy Leader Seizure
November 2023  ·  Red Sea
Houthi commandos rappel from helicopter to seize the Galaxy Leader, a vehicle carrier with Israeli links. The 25-crew ship is held at Hodeidah port for months in a high-profile act of maritime hostage-taking broadcast internationally.
Missile Strikes on Israel
October 2023–Present  ·  Israel
Dozens of ballistic missiles and drones fired at Israeli territory, including Tel Aviv and Eilat. Most intercepted by Israel's Arrow and Iron Dome systems. One ballistic missile lands near Ben Gurion Airport in a significant escalation in May 2024.

Affected Populations & IFC Desks

The Houthi insurgency and its decade-long war with the Saudi-led coalition have produced one of the world's most severe humanitarian crises, with catastrophic consequences for civilians across Yemen and serious knock-on effects for regional security and global trade.

Middle East Desk
Yemeni civilians in Houthi-controlled areas subjected to forced conscription, arbitrary detention, torture, enforced disappearance, and systematic suppression of free expression — documented extensively by UN human rights bodies.
Middle East Desk
Yemeni civilians caught in the crossfire of the broader civil war: over 150,000 killed since 2015, millions displaced, and an estimated 21 million people — two-thirds of Yemen's population — requiring humanitarian assistance.
Middle East Desk
Yemen's Baha'i community and religious minorities facing systematic persecution, imprisonment, and in some cases death sentences under Houthi governance — documented by the UN Special Rapporteur on Freedom of Religion or Belief.
Middle East Desk
Saudi and Emirati civilians targeted in Houthi cross-border missile, drone, and artillery strikes — including attacks on Riyadh, Jazan, Abha, and Abu Dhabi, causing civilian casualties and widespread psychological harm.
Global Desk
International maritime crews and shipping operators targeted in the Red Sea: attacks on over 100 vessels since November 2023 have caused deaths among seafarers, driven up global insurance and freight costs, and disrupted humanitarian supply chains to the region.
Middle East Desk
Yemeni children forcibly conscripted as fighters across Houthi-controlled areas. The UN Panel of Experts on Yemen has documented thousands of cases of child recruitment annually, making the Houthis one of the world's leading perpetrators of this war crime.

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