Al-Qaeda in the Arabian Peninsula (), or AQAP, is a Salafi-jihadist militant organization which seeks to overthrow the Yemeni and Saudi governments. The group is based and primarily active in Yemen, while also conducting operations in Saudi Arabia and seeks to establish an Islamic emirate in the Arabian Peninsula. AQAP is widely considered to be the most radical branch of al-Qaeda and is viewed by al-Qaeda's central command as its most loyal and important franchise.

During the 2000s, AQAP of Saudi Arabia carried out several mass-casualty attacks against civilian populations in Saudi Arabia. After the failure of its bombing campaign and the dismantling of al-Qaeda cells in Saudi Arabia, several AQ operatives fled to Yemen in the late 2000s and established AQAP. The group took advantage of the 2011 Yemeni revolution to seize and establish several emirates in southern Yemen, including in Zinjibar, the capital of Abyan governorate. After being driven out through a government offensive in 2012, the group returned to an insurgent campaign rather than holding territory. AQAP would again capitalize on political turmoil in the country when the Yemeni civil war broke out in 2014. AQAP would reach its territorial peak in 2015, with the group seizing much of southern Hadhramaut governorate, including its capital Mukalla, recapturing their emirates in the south, and establishing a presence across multiple fronts in the civil war against the Houthis, most prominently in Aden, Al Bayda governorate and Taiz. Its strength has since waned due to internal struggles and operations waged against them by multiple parties in the civil war, as well as through an ongoing drone campaign by the United States which has killed many of its senior leaders and members.

Formed as a merger of al-Qaeda's Saudi and Yemeni branches in 2009, AQAP was established with the aim of carrying out mass-casualty terrorist attacks in several countries across the world on behalf of al-Qaeda Central. In 2011, AQAP created Ansar Al-Sharia (, Jamā‘at Anṣār ash-Sharī‘ah, "Group of the Helpers of the Sharia") as a subsidiary organization which would operate exclusively within Yemen. The group was created in order to appeal to youth and their issues within only Yemen and to distance themselves from the reputation attributed to the al-Qaeda organization. It was Ansar Al-Sharia which established various emirates across southern Yemen, though despite its nominal independence the group is widely understood as being a rebrand or direct extension of AQAP.

AQAP espouses a radical interpretation of the Wahhabi ideology, characterized by incitement to sectarian violence against Sufis and Shias in Yemen. In addition to its activities within the Arabian Peninsula, AQAP has conducted several high-profile attacks in the Western world such as the attempted bombing of Northwest Airlines Flight 253 in 2009, the 2015 Charlie Hebdo shooting, and the 2019 Naval Air Station Pensacola shooting. The group has been designated a terrorist organization by the United Nations, United States, Saudi Arabia, UAE and several other countries.

Organization

Formation In the aftermath of the Soviet-Afghan war, President of the Republic of Yemen Ali Abdullah Saleh utilized thousands of Yemeni former mujahideen to fight for the Yemen Arab Republic during the Yemeni civil war of 1994, and to neutralize southern secessionists after it. A group of Yemenis who had trained under Osama bin Laden in Afghanistan formed Islamic Jihad in Yemen, which operated from 1990 to 1994. Other such Al-Qaeda affiliated groups included the Aden-Abyan Islamic Army and Al-Qaeda in Yemen (AQY).

On 12 October 2000, two AQY suicide bombers drove a rubber dinghy loaded with explosives into the side of the USS Cole while it was docked at the Port of Aden, blowing a hole in the side of the ship and killing 17 members of the crew, as well as injuring 40. This same tactic was used on 6 October 2002, when the MV Limburg was bombed while approaching the Mina Al-Dabah port, killing 1 crew member and wounding 12.

After the September 11 attacks, Saleh was heavily pressured by the United States into cracking down on Al-Qaeda groups in the country. Saleh obliged and agreed to coordinated several operations with the U.S. to defeat Al-Qaeda, such as with a CIA drone strike on 3 November 2002 which killed AQY leader Abu Ali Al-Harithi in Marib governorate. By the end of 2003, AQY and other Al-Qaeda affiliates were significantly weakened. In February 2006, 23 Al-Qaeda members escaped imprisonment in Sana'a through digging a 140-metre long tunnel. The escapees would end up rebuilding Al-Qaeda's footprint within the country over the next few years. Al-Qaeda maintained a presence in Yemen, evident by multiple high-profile attacks in the country such as the 2007 Marib car bombing and the 2008 attack on the United States embassy in Sana'a.

After initial success through early operations such as the 2003 Riyadh bombings, murder of Paul Marshall Johnson Jr. in 2004, 2004 Khobar attack, and the 2005 Qatar theatre bombing, Al-Qaeda of Saudi Arabia's remnants had been forced to flee to Yemen by late 2008 due to extreme pressure by the Saudi government. Al-Qaeda of Saudi Arabia and Al-Qaeda in Yemen merged in January 2009 to form Al-Qaeda in the Arabian Peninsula. Nasir Al-Wuhayshi, leader of the Yemeni branch, was confirmed to be the first emir of AQAP by Ayman Al-Zawahiri.

Since its formation in 2009, AQAP has been widely regarded as the most loyal and closest branch of al-Qaeda Central. In 2013, al-Qaeda emir Ayman al-Zawahiri appointed Nasir al-Wuhayshi as the general manager of AQC, a move that underscored the close relations between AQAP and AQC.

Ideology AQAP adheres to a militant interpretation of the Wahhabi ideology that advocates violence against the Saudi state. The organization has also launched sectarian attacks against Sufis and Shias in Yemen, and regularly incites anti-Shia sectarian sentiments through its propaganda. AQAP is also the main affiliate of al-Qaeda that implements the organization's "far enemy" strategy and has carried out several high-profile international terrorist attacks on behalf of al-Qaeda Central (AQC).

According to CTC Westpoint, Salafi-jihadism has been the unifying ideology of AQAP despite differences in politics, generations and overall goals. AQAP seeks to expel Western presence and influences in the Arabian Peninsula and to establish an Islamic emirate within Yemen. The group declares that the government of Yemen is a secular and "apostate" entity which must be overthrown and replaced by an Islamic government which adheres to their interpretation of sharia law. They also argue that the Yemeni government is a puppet state of America, which secretly governs the country through their embassy in Sana'a. AQAP emphasizes that jihad is the answer to the issues of the Yemeni people, calling on sheiks, preachers and tribal leader to endorse jihad against the government and declare it illegitimate. The group operates upon a gradualist approach in order to fulfil this goal, prioritizing the establishment of acceptance amongst local Yemenis before gaining popular support among the people, and then willingness from the populace to defend AQAP-held territory. This formula would be appropriated across multiple 'emirates' across Yemen, with the eventual goal of unification in the form of a caliphate, allowing them to use Yemen as a launching pad for international attacks and operations.

In addition to attacking the Yemeni government, AQAP is one of the few Al-Qaeda affiliates which actively attempts to attack the "far enemy", that being the United States. They advocate for the unity of Muslims in order to attack American targets, whether civilian, military or diplomatic. AQAP asserts that Yemen should be the epicenter of jihad against America and secular Arab governments, as opposed to then-occupied Iraq or Afghanistan, as they deem it a religious obligation to expel "polytheists and apostates" from the Arabian Peninsula. They also believe that attacking American interests in the Arabian Peninsula, specifically oil production, would lead to the U.S. withdrawing from Iraq and Afghanistan and eventually collapsing entirely. Prior to the Yemeni revolution, most of AQAP's high-profile activities were attempted attacks against the United States, most notably the attempted bombing of Northwest Airlines Flight 253 in 2009 and a cargo plane bomb plot in 2010. A July 2010 letter from senior Al-Qaeda core member Atiyya Abd Al-Rahman urged AQAP to avoid conflict with the Yemeni government and instead dedicate itself towards attacking America. One of AQAP's main ideologues on jihad against the West was Anwar Al-Awlaki, a Yemeni American preacher who had incited multiple attacks in the United States.

Structure AQAP's leadership and organizational structure is hierarchical and decentralized. The leader of the organization is the emir, who as of October 2024 is Sa'ad bin Atef Al-Awlaki. The emir oversees all of the group's activities and makes decisions by consulting the Shura Council. Specific duties attributed to the emir include 'approving targets, recruiting new members, allocating resources to training and attack planning, and tasking others to carry out attacks.' After the emir, leadership is dispersed throughout different departments and the Shura Council. AQAP's general command is composed of the emir along with 6 to 8 other leaders who share decision-making authority. In regards to the group's subdivisions, a United Nations Security Council report from 2018 states that the group possesses 'doctrinal (shari'a), propaganda, military, security and financial subdivisions', each with their own executive committees.

The military commander of AQAP and his Committee directs the organizations' attacks, bombings, kidnappings and robberies, with its leader currently being Ammar Al-San’ani. The Military Committee administers a mid-level leadership structure in the group with a clear chain of command; regional emirs are appointed as military commanders for each governorate (wilaya) in the country, them with their own Governorate Committee's. Below regional emirs are then commanders for different districts in the governorate who are in charge of recruits; the number of district commanders in a governorate corresponds with their strategic importance, with deputy commanders occasionally being appointed. The Military Committee researches and authorizes attacks before the Governorate Committee plans and assigns operations, leaving the district commanders to execute them. District commanders can participate in media, intelligence, and military planning or act as emissaries for AQAP clerics before being appointed governorate commander. In the event that any member in the command chain is killed, another member is trained and promoted to the vacant position.

Size and Membership The International Crisis Group maintains that before the Yemeni revolution in 2011, AQAP possessed at most 'several hundred members.' According to the Yemeni foreign minister Abu Bakr Al-Kurbi, the group had as many as 300 members by late 2009. An estimate from the U.S. Department of State suggested that AQAP had approximately 1,000 members in 2014. This number had increased to 4,000 in a State Department release covering the group during 2016, after the Yemeni civil war had started. A UN Security Council report from July 2024 indicated that AQAP had between 2,000 and 3,000 members.