Houthi allies In April 2015,
United States National Security Council spokeswoman
Bernadette Meehan stated that: "It remains our assessment that Iran does not exert command and control over the Houthis in Yemen". The United States has regularly accused the Iranian government of arming and funding the Houthis. In an April 2015 interview with the
PBS Newshour, then-
U.S. secretary of state John Kerry accused Iran of attempting to destabilize Yemen. While the Houthis and the Iranian government have denied any military affiliation, Iranian supreme leader
Ali Khamenei openly announced his "spiritual" support of the movement in a personal meeting with the Houthi spokesperson Mohammed Abdul Salam in
Tehran, in the midst of ongoing conflicts in Aden in 2019. Although there has been no direct intervention by the Iranian government, the Yemeni civil war is widely regarded as part of the
Iran-Saudi proxy conflict. The United States, Saudi Arabia, UAE and various Western commentators have accused various
IRGC networks of assisting Houthis through arms supplies, military training, logistics, strategic co-ordination and media support. Saudi Arabia views activities by the
Quds Forces and
Hezbollah in neighboring Yemen as part of Iranian attempts to establish a
satellite state in the country and trap them into a stalemate. Western commentators have argued that the Iranian policy in Yemen has been hinged on developing bases for ballistic missiles targeting
GCC countries, establishing naval dominance in the strategic
Bab al-Mandeb Strait by advancing
area denial capabilities and
weapons trafficking, in addition to the intensification of
Iranian cyberwarfare. However, this characterization has been disputed by various analysts and academics, who assert that Houthis are independent of Iran. According to professor
Stephen Zunes, the majority of Houthi arms supplies primarily originate from the
black market, and Houthis obtain most of their weaponry from non-Iranian sources. On 7 August 2018,
IRGC commander
Nasser Shabani was quoted by the
Fars News Agency, the semi-official news agency of the Iranian government, as saying, "We (IRGC) told Yemenis [Houthi rebels] to strike two Saudi oil tankers, and they did it".
The Wall Street Journal reported in March 2023 that the Iranian government agreed to halt all military support to Houthis and abide by the
UN arms embargo, as part of a
Chinese-brokered
Iran-Saudi rapprochement deal. The
Eritrean government has also been accused of funneling Iranian material to the Houthis, as well as offering medical care for injured Houthi fighters. However, it has called the allegations "groundless" and said after the outbreak of open hostilities that it views the Yemeni crisis "as an internal matter".
Yemeni government supporters The Yemeni government meanwhile has enjoyed significant international backing from the United States and Persian Gulf monarchies after requesting their support.
U.S. drone strikes were conducted regularly in Yemen during Hadi's presidency in
Sanaa, usually targeting
Al Qaeda in the Arabian Peninsula. The United States was also a major supplier of weapons to the Yemeni government, although according to the
Pentagon, hundreds of millions of
dollars' worth of that material has gone missing since it was delivered. Saudi Arabia provided financial aid to Yemen until late 2014, when it suspended it amid the Houthis' takeover of Sanaa and increasing influence over the Yemeni government. According to
Amnesty International, the
United Kingdom also supplied weaponry used by Saudi-led coalition to strike targets in Yemen. Amnesty International also says that U.S.-based
Raytheon Company supplied a laser-guided bomb that killed six civilians on 28 June 2019. In May 2019, State Secretary
Mike Pompeo announced an "emergency" to push through $8.1 billion of arms sales to Gulf allies like Saudi Arabia, the United Arab Emirates, and Jordan, citing Iranian activity in the Middle East. Despite widespread congressional opposition, an August 2020 report by the Office of Inspector General detailed that Pompeo complied with the legal prerequisites to do so. The report, however, also noted that the possible threat to the lives of the civilians caught in the crossfire was not assessed properly at the time of the emergency. The State Department was also accused in the report of violating the threshold of the
Arms Export Control Act while approving arms sales to Gulf states.
Saudi-led intervention in Yemen against the Saudi-led intervention, March 2016 In response to rumors that
Saudi Arabia could intervene in Yemen, Houthi commander Ali al-Shami boasted on 24 March 2015 that his forces would invade the larger kingdom and not stop at
Mecca, but rather
Riyadh. The following evening, answering a request by Yemen's internationally recognized government, Saudi Arabia began a military intervention alongside eight other Arab States (United Arab Emirates, Egypt, Jordan, Bahrain, Kuwait, Qatar, Morocco, and Sudan) and Pakistan. The
United States also helped attack the Houthis – bombing positions throughout Sanaa. In a joint statement, the nations of the
Gulf Cooperation Council (with the exception of
Oman) said they decided to intervene against the Houthis in Yemen at the request of Hadi's government.
King Salman of Saudi Arabia declared the
Royal Saudi Air Force to be in full control of Yemeni airspace within hours of the operation beginning.
Al Jazeera reported that
Mohammed Ali al-Houthi, a Houthi commander appointed in February as President of the
Revolutionary Committee, was injured by an airstrike in Sanaa on the first night of the campaign. After the launch of Operation
Decisive Storm, Saudi Arabia along with the UAE used lobbying in an attempt to rally the international community to their cause. However, Pakistan agreed to provide support in line with a
United Nations Security Council resolution, dispatching warships to enforce an
arms embargo against the Houthis. On 21 April 2015, the bombing campaign was officially declared over, with Saudi officials saying they would begin
Operation Restoring Hope as a combination of political, diplomatic, and military efforts to end the war. Even still, airstrikes continued against Houthi targets, and fighting in Aden and
Ad Dali' went on. The United Arab Emirates claimed to take an active role against fighting
AQAP and
IS-YP presence in Yemen through a partnership with the United States. In an Op-Ed in
The Washington Post, Yousef Al Otaiba, the UAE ambassador to the United States, described that the intervention has reduced
AQAP presence in Yemen to its weakest point since 2012 with many areas previously under their control liberated. The ambassador claimed that more than 2,000 militants have been removed from the battlefield, with their controlled areas now having improved security and a better delivered humanitarian and development assistance such as to the port city of
Mukalla and other liberated areas. UAE Brigadier General Musallam Al Rashidi responded to the accusations by stating that Al Qaeda cannot be reasoned with and cited that they killed many of his soldiers. The UAE military stated that accusations of allowing AQAP to leave with cash contradict their primary objective of depriving AQAP of its financial strength. The notion of the coalition recruiting or paying AQAP has been thoroughly denied by the United States
Pentagon, with spokesperson Robert Manning calling the news source "patently false". The governor of Hadramut
Faraj al-Bahsani, dismissed the accusations that Al Qaeda has joined with the coalition rank, explaining that if they did there would be sleeper cells and that he would be "the first one to be killed". According to
The Independent, AQAP activity on social media as well as the number of terror attacks conducted by them has decreased since the Emirati intervention. In March 2019, the
United States Congress voted to end US support to the Saudi war effort; however,
US President Donald Trump vetoed it. His successor, President
Joe Biden, announced a freeze on arms sales to Saudi Arabia and the UAE in January 2021. He also declared that he would end American support for the Saudi coalition. On 4 February 2021, Biden announced an end to the
US support for Saudi-led operations in Yemen. As of 13 April 2021, arms sales to the UAE had not been stopped, while sales to Saudi Arabia were still paused. However, details of the end of American involvement in the war were not released . In August 2020, confidential Saudi documents revealed the kingdom's strategy in Yemen. The 162 pages of classified Saudi documents dated back prior to 2015. The pages showed the kingdom's inaction in stopping the Houthis from capturing Sanaa, despite Saudi intelligence reports. The records also exposed that Saudi Arabia had worked to hamper the rebuilding projects commissioned by
Germany and Qatar in Saada. This happened after the fighting between the two warring camps came to a halt due to a ceasefire.
Arab League In
Egypt, the Yemeni foreign minister called in 2015 for an
Arab League military intervention against the Houthis. The Arab League announced the formation of a unified military force to respond to conflict in Yemen and Libya in March 2015.
US role Since the mid-2000s, the
United States has been carrying out targeted killings of
Al-Qaeda militants in
Yemen, although the U.S. government generally does not confirm involvement in specific attacks conducted by
unmanned aerial vehicles as a matter of policy. The
Bureau of Investigative Journalism documented 415 strikes in Pakistan and Yemen by 2015 since the
September 11 attacks, and according to the organization's estimates, between 423 and 962 deaths are believed to have been civilians.
Michael Morell, former deputy director of the
CIA, claims the numbers were significantly lower. During the civil war in Yemen, drone strikes have continued, targeting suspected leaders of
Al Qaeda in the Arabian Peninsula.
Ibrahim al-Rubeish and
Nasser bin Ali al-Ansi, two leading AQAP figures, were killed by U.S. drone strikes in the vicinity of
Mukalla in 2015. Approximately 240 suspected AQAP militants have been killed by American drone strikes since the civil war began. On 2013,
Radhya Al-Mutawakel and Abdelrasheed Al-Faqih, Directors of Mwatana, published a joint report with
Open Society Foundations titled 'Death by Drone', detailing evidence of civilian casualties and damage to civilian objects in nine US drone strikes. The United States supplied intelligence and logistical support, including aerial refueling and search and rescue for downed coalition pilots. Also, US revved arms sales to coalition countries. In January 2016,
Saudi Arabia's foreign minister stated: US and UK military officials were in the command and control center responsible for the Saudi-led airstrikes in Yemen and had access to the list of targets but were not involved in the selection of targets. In March 2025, the United States launched
air and naval attacks against dozens of Houthi targets in Yemen, the largest military operation in the Middle East of United States President
Donald Trump's
second term. US officials said that the first wave of attacks, launched on 15 March against radars, air defenses, and missile and drone systems, were the first in a wider effort to end
Houthi attacks on commercial vessels and warships in the
Red Sea and
Gulf of Aden.
Islamic State presence and operations The Islamic State (IS) has proclaimed several provinces in Yemen and has urged its adherents to wage war against the Houthi movement, as well as against Zaydis in general. ISIS militants have conducted bombing attacks in various parts of the country, particularly against mosques in Sanaa. On 6 October 2015, IS militants conducted a
series of suicide bombings in Aden that killed 15 soldiers affiliated with the Hadi-led government and the Saudi-led coalition. The attacks were directed against the al-Qasr hotel, which had been a headquarters for pro-Hadi officials, and also military facilities. Yemeni officials and UAE state news agency declared that 11 Yemeni and 4 United Arab Emirates soldiers were killed in Aden due to 4 coordinated Islamic State suicide bombings. Prior to the claim of responsibility by the Islamic State, UAE officials blamed the Houthis and former president Ali Abdullah Saleh, for the attacks. ==Humanitarian aspects of the war==