Yemen’s Houthi group has again vowed that its attacks aimed at stopping Israel’s war on Gaza will not stop after the United States and the United Kingdom launched dozens of attacks overnight on Saturday.

The latest attacks, supported by six other allies, come a day after the US launched dozens of strikes against armed groups in Iraq and Syria that Washington said were backed by Iran.

The Houthis initially only attacked Israeli-linked ships in the Red Sea in solidarity with the Palestinians, but expanded their attacks to include British and US ships after Washington and London launched attacks in Yemen.

Let’s take a look at which Houthi targets were attacked, what kind of weapons were used, and how everyone responded.

Which Houthi targets were attacked?

The US and Britain launched a spate of attacks on Houthi-controlled areas in Yemen on Saturday, February 3. US Central Command (CENTCOM) said it hit a Houthi anti-ship missile in the Red Sea in a separate attack on Sunday.

The US and Britain said they had struck 36 Houthi positions in Yemen, while Houthi military spokesman Yahya Saree said the capital Sanaa was among the sites targeted in Saturday’s attacks. There have been no reports of casualties so far.

The targets included underground storage facilities, command and control centers, missile systems, storage and deployment sites for drones, radars and helicopters, according to CENTCOM.

The U.S. military said it hit 36 ​​Houthi targets in 13 locations but, like many previous strikes in Yemen since the start of the war on Gaza, stopped short of disclosing further details. This was the third major joint operation against the Houthis in two weeks.

The U.S. had also announced attacks on several anti-ship cruise missiles that it said posed a threat to its military vessels and commercial vessels passing through waters near Yemen.

The military of the Yemeni group, also known as Ansarallah, said it was the target of 48 attacks on several governorates, including 13 on Sanaa and surrounding areas, 11 on Taiz, nine on Hodeida, seven on al-Bayda, seven on Hajjah and one on Saada. No casualties were reported.

What weapons were used in the attacks in Yemen?

The Houthi targets were attacked by both US military warplanes and military ships and British Air Force fighter jets.

F/A-18 fighter jets from the aircraft carrier USS Dwight D Eisenhower, the British Typhoon FGR4 fighter jet and the US Navy destroyers USS Gravely and USS Carney were involved in the attacks, according to US officials and British Ministry of Defense authorities, quoted by Associated Press.

The US ships fired Tomahawk missiles from the Red Sea, it said.

The attacks come as the Houthis continue to launch almost daily missile, drone and boat attacks on Israeli-linked commercial vessels and US and British military vessels in the Red Sea and Gulf of Aden.

The Houthis say the attacks that have disrupted global trade will stop if Israel ceases fire in Gaza.

Who was targeted in Iraq and Syria and why?

The attacks in Yemen came a day after U.S. retaliation for the Jan. 28 drone strike by the Islamic Resistance of Iraq, a coalition of armed groups with ties to Iran, that killed three U.S. soldiers at an outpost in Jordan.

The US military said its troops attacked 85 targets in Syria and Iraq linked to Iran’s Islamic Revolutionary Guard Corps (IRGC) and political and military groups.

Some of the armed groups that are part of the Iran-backed “Axis of Resistance” have carried out dozens of attacks against US interests in the region as part of Israel’s brutal war on Gaza. They demand that Israel declare a ceasefire and allow humanitarian aid into the Palestinian enclave, where famine is raging. They have also vowed to fight the U.S. military presence in Syria, Iraq and other places they see as an “occupation” of their country.

Syria’s eastern province of Deir el-Zour and the northeastern province of Hasakeh, where US bases are located, have been under attack for years.

The Euphrates cuts through Syria into Iraq, with U.S. troops and U.S.-backed Kurdish-led fighters on the eastern bank and Iranian-backed fighters and Syrian government forces on the west.

US bases in Iraq, particularly the Ain al-Assad base, have also been subjected to hundreds of attacks in recent years. The base was where the IRGC fired missiles after Washington assassinated its top general, Qassem Soleimani, in January 2020. Dozens of US soldiers were injured in the attack, but none were killed.

Iran-backed armed groups control the Iraqi side of the border and move freely in and out of Syria, where they occupy posts alongside their allies in the powerful Lebanese Hezbollah and other Shiite armed groups. Tehran is Syrian President Bashar al-Assad’s main military backer in the decades-long war.

What was hit in the deadly attacks in Iraq and Syria?

The US military flew B1 bombers from the US to attack targets in Iraq and Syria.

It said the spate of attacks hit command and control centers, intelligence centers, missiles and missiles, drone and ammunition depots and other facilities linked to the Quds Force, the IRGC’s external operations arm.

Syrian opposition activists said the strikes hit the Imam Ali base near the Syrian border town of Boukamal, the Ein Ali base in Quriya, south of the strategic town of Mayadeen, and a radar center on a mountain near the eponymous provincial capital Deir el- Zour.

Rami Abdurrahman, head of the Britain-based Syrian Observatory for Human Rights, said 29 rank-and-file fighters were killed in those attacks, according to the AP. Al Jazeera could not independently verify the death toll.

According to Omar Abu Layla, a Europe-based activist and head of media outlet Deir Ezzor 24, the attacks also hit a border crossing called Humaydiya, where militias travel back and forth between Iraq and Syria. He said the attacks also hit an area within the city of Mayadeen known as the “security district.”

Iraqi government spokesman Bassim al-Awadi said the border attacks killed 16 people and caused “significant damage” to homes and private properties.

The Popular Mobilization Forces (PMF), a coalition of Iranian-backed militias nominally under the control of the Iraqi military, said the attacks in western Iraq hit a logistical support post, a tank battalion, an artillery post and a hospital. The PMF said 16 people were killed and 36 injured and authorities were searching for more missing people.

The Islamic Resistance in Iraq, which was blamed for the attack in Jordan, targeted US interests in both Iraq and Syria within hours of the US strikes. They promised more to come.

How did everyone react?

Iran, Iraq and Syria quickly condemned the US attacks, which they said violated the sovereignty of both countries. This comes as Iraqi politicians increasingly discuss withdrawing US troops from the country.

Tehran, like Hamas, noted that the attacks also serve to shield Israel by diverting attention from its attacks on Palestinians, more than 27,000 of whom have been killed in Gaza since October.

The UK and EU backed Washington, while analysts expressed concerns that the vicious cycle of violence could lead to all-out war across the region.