EXPLAINED: Why the US and UK Just Launched Airstrikes In Yemen

Heavy US and British air strikes pounded targets in rebel-held Yemen early on Friday after weeks of disruptive attacks on Red Sea shipping by Iran-backed Houthi forces acting in solidarity with Hamas.

What was hit?

The strikes involved fighter jets and Tomahawk missiles, the US Air Forces Central Command said in a statement. Sixty targets at 16 Houthi locations were hit by more than 100 precision-guided munitions, it said.

The Houthi rebels' Al-Masirah TV station said the strikes targeted an airbase, airports and a military camp, with AFP correspondents and witnesses also reporting they could hear bombardments.

Unverified images on social media, some of them purportedly of Al-Dailami airbase north of Sanaa, showed explosions lighting up the sky as loud bangs and the roar of planes sounded.

Why are the Houthi rebels being targeted?

The Houthis have carried out a growing number of attacks on what they deem to be Israel-linked shipping in the key international trade route since the eruption of the war in Gaza sparked by Hamas's unprecedented attack on Israel on October 7.

The intensifying attacks have caused shipping companies to divert around South Africa's Cape of Good Hope, sparking fears of a shock to the global economy.

The rebels have controlled a major part of Yemen since a civil war erupted there in 2014 and are part of the Iran-backed “axis of resistance” arrayed against Israel.

The Houthi rebels say they are acting in solidarity with Palestinians in response to Israel's bombardment of Gaza after the October 7 attack, and have launched a series of drones and missiles towards Israel.

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Israel has also been facing cross-border fire along its northern frontier from Iran-backed militants in Syria and Lebanon – particularly the Hamas-aligned Hezbollah – and has responded with strikes of its own in both countries.

US and allied forces in Iraq and Syria have also faced stepped-up attacks since the outbreak of the war in Gaza, with Washington responding to several by bombing the sites of pro-Iran groups.

The United States and its allies had issued a series of increasingly stern warnings to the Houthis to stop the shipping attacks, although Washington has been wary of inflaming regional tensions.

Washington set up an international coalition in December – dubbed Operation Prosperity Guardian – to protect maritime traffic in the area, through which 12 percent of world trade flows.

Twelve nations led by the United States warned the Houthis on January 3 of “consequences” unless they immediately stopped attacks on commercial vessels.

On Tuesday, however, the Houthis launched what London called their most significant attack yet, with US and British forces shooting down 18 drones and three missiles.

The final straw for the Western allies appeared to come early Thursday when the US military said the Houthis fired an anti-ship ballistic missile into a shipping lane in the Gulf of Aden.

It was the 27th attack on international shipping in the Red Sea since November 19, the US military said.

What has the US and UK said?

US President Joe Biden called the US and British strikes a “defensive action” after the Red Sea attacks and said he “will not hesitate” to order further military action if needed.

Biden called the strikes a “direct response” to the “unprecedented” attacks by the Houthi, “including the use of anti-ship ballistic missiles for the first time in history.”

“These attacks have endangered US personnel, civilian mariners, and our partners, jeopardized trade, and threatened freedom of navigation,” he said.

Blaming the Houthis for ignoring “repeated warnings,” UK Prime Minister Rishi Sunak said in a statement the strikes were “necessary and proportionate.”

US Defence Secretary Lloyd Austin said the strikes “targeted sites associated with the Houthis' unmanned aerial vehicle, ballistic and cruise missile, and coastal radar and air surveillance capabilities.”

A joint statement by the United States, Britain, Australia, Bahrain, Canada, Denmark, Germany, the Netherlands, New Zealand and South Korea said the “aim remains to de-escalate tensions and restore stability in the Red Sea.”

“But let our message be clear: we will not hesitate to defend lives and protect the free flow of commerce in one of the world's most critical waterways in the face of continued threats,” it said.

What have the Houthis said?

“Our country was subjected to a massive aggressive attack by American and British ships, submarines and warplanes,” Houthi Deputy Foreign Minister Hussein Al-Ezzi said, according to official rebel media.

“America and Britain will have to prepare to pay a heavy price and bear all the dire consequences of this blatant aggression,” he said.

The Houthis said there was “no justification” for the air strikes and warned that attacks on Israel-linked shipping would continue.

“We affirm that there is absolutely no justification for this aggression against Yemen, as there was no threat to international navigation in the Red and Arabian Seas, and the targeting was and will continue to affect Israeli ships or those heading to the ports of occupied Palestine,” Houthi spokesman Mohammed Abdulsalam posted on X, formerly Twitter.

What are the possible wider consequences?

The Western strikes could risk turning an already-tense situation in the Middle East into a wider conflagration pitting the United States and Israel against Iran and its regional proxies. 

The United States strengthened its military posture in the region immediately after the October 7 attacks on Israel and warned Iran and its allies not to escalate the situation.

The US was initially cautious in its response because it is seeking to preserve a fragile peace in Yemen, where a decade of civil war and a Saudi-led coalition's military campaign have led to one of the world's worst humanitarian crises in the Arabian peninsula's poorest country.

Yemen's neighbour Saudi Arabia, which is trying to end its involvement in a nine-year war with the Houthis, urged against escalation.

“The Kingdom of Saudi Arabia is following with great concern the military operations,” a foreign ministry statement said, calling for “self-restraint and avoiding escalation.”