Al-Qaeda

Overview

Al-Qaeda is a transnational terrorist organization founded by Osama bin Laden in the late 1980s. Its leadership built training camps, recruited militants across borders and organized a campaign of armed jihad against the United States, Israel and governments in the Arab world. Jihad means struggle or effort; Al-Qaeda’s program centered on armed jihad, and its attacks on civilians used terrorism as a tactic. The organization’s most consequential operation was the September 11 attacks in 2001, carried out by 19 attackers and killing 2,977 people. Al-Qaeda also bombed United States embassies in East Africa in 1998 and attacked the USS Cole in Yemen in 2000.

Al-Qaeda developed from a leadership-centered organization with camps and international operatives into a network of regional branches. The United States campaign in Afghanistan after September 11 destroyed much of its sanctuary and disrupted communication, training and finance. Local cells and affiliates subsequently gained greater room to operate under Al-Qaeda’s name and ideology. This structure helped the organization survive bin Laden’s death in 2011 and that of his successor, Ayman al-Zawahiri, in 2022. It also limited central leaders’ ability to settle disputes among affiliates. The rupture with the Islamic State and the later split among Al-Qaeda’s supporters in Syria exposed those limits.

Founding and ideology

Bin Laden established Al-Qaeda in the late 1980s amid the mobilization of foreign volunteers for the war in Afghanistan. The emerging organization provided a base for recruitment, military training and coordination across national borders. An early donor record known as the Golden Chain listed 20 businesspeople and politicians from Saudi Arabia and other Gulf states. Al-Qaeda later incorporated militants from other organizations, including Egyptian Islamic Jihad. Al-Zawahiri, who led Egyptian Islamic Jihad from 1993, became a principal strategist as well as a leader alongside bin Laden. In June 2001, he announced a formal union of organizations associated with bin Laden’s front under the name Qaedat al-Jihad.

Al-Qaeda’s founders drew on several ideological currents. Wahhabism influenced the organization, but bin Laden and al-Zawahiri combined it with Sayyid Qutb’s ideas and other strands of political Islam. Political Islam refers here to an ideology seeking to shape government and law, distinct from Islam as a religion. Al-Qaeda’s branches sought to overthrow existing governments, establish Islamic emirates and ultimately unite them in a caliphate. Al-Zawahiri argued that attacks on the United States and other external supporters of Arab governments would weaken those governments and advance their overthrow. Israel was also a declared target. After September 11, he set out his strategic vision in the twelve-part essay Knights Under the Prophet’s Banner.

Al-Qaeda’s leaders presented their campaign as global jihad, addressing potential recruits and sympathizers as well as trained operatives. Its doctrine did not determine every affiliate’s conduct: local leadership, opportunity and rivalries shaped operations. In his 2013 General Guidelines for Jihad, al-Zawahiri urged followers to cooperate with other Islamic groups where they agreed and advise them where they differed. That approach later became a point of contention with Islamic State, which attacked Al-Qaeda for accommodating groups it treated as enemies, including the Muslim Brotherhood. Al-Qaeda’s ideological program and the terrorist methods used to pursue it are both central to its history.

History

During the 1990s, Al-Qaeda expanded its training system and planned attacks on American targets. Its leadership prepared major operations years ahead, arranging explosives, weapons, safehouses and false identities for operatives. On August 7, 1998, bombs destroyed the United States embassies in Nairobi, Kenya, and Dar es Salaam, Tanzania. On October 12, 2000, suicide attackers struck the USS Cole while the American warship was in Aden, Yemen. The attacks established Al-Qaeda’s capacity to coordinate lethal operations far from its Afghan base. In 2020, Sudan transferred $335 million in compensation connected to its role in the embassy bombings and the USS Cole attack.

On September 11, 2001, 19 Al-Qaeda attackers hijacked four passenger aircraft and struck the World Trade Center in New York and the Pentagon near Washington, while a fourth aircraft crashed in Pennsylvania. The attacks killed 2,977 people. Al-Qaeda carried them out; accusations that Israel or Mossad orchestrated them have no evidentiary basis. President George W. Bush launched a military campaign in Afghanistan against Al-Qaeda and its Taliban supporters. The 2001 invasion removed the Taliban from power and disrupted Al-Qaeda’s camps, sanctuary, communications and financial connections. Thousands of militants were killed or captured, while surviving leaders went into hiding. Most Middle Eastern governments froze Al-Qaeda assets after the attacks under United Nations Security Council Resolution 1373.

Loss of its Afghan base changed Al-Qaeda without ending it. Localized cells shared its name and ideology while exercising substantial autonomy. By mid-2008, the organization had strengthened a safe haven in Pakistan’s Federally Administered Tribal Areas through alliances with local armed groups. Counterterrorism operations constrained its ability to strike the United States, but its leadership continued to encourage attacks and cultivate branches elsewhere. Bin Laden’s video of September 8, 2007, followed by an audio recording on September 11, began a sustained media campaign aimed at American and European audiences, audiences in Pakistan and Iraq, and jihadist operatives. Al-Zawahiri’s messages likewise kept the organization’s strategic aims in circulation.

United States forces killed bin Laden in Abbottabad, Pakistan, on May 2, 2011. Al-Qaeda announced al-Zawahiri as his successor on June 16 and reaffirmed its campaign against the United States, Israel and Arab rulers. Branches continued operating across several countries during his leadership. The United States withdrew from Afghanistan in 2021, twenty years after September 11 prompted its intervention. A United States strike killed al-Zawahiri in Kabul on July 31, 2022, while he was staying in a house with his family. His presence there underscored the continuing importance of Afghanistan to Al-Qaeda’s leadership after the Taliban’s return to power. Leadership losses did not dissolve its regional network.

Structure and leadership

Al-Qaeda combined central leadership with affiliated organizations whose priorities often reflected local wars. Bin Laden supplied its founding leadership and international profile; al-Zawahiri developed strategy, issued guidance and tried to manage disputes among branches. Central direction was consequential but uneven. A review of papers recovered in the Abbottabad raid found that bin Laden faced serious difficulties exercising substantial control over affiliates. The Syrian rupture under al-Zawahiri later showed how an affiliate could resist central instructions even while its members and rivals invoked Al-Qaeda’s authority.

Abu Musab al-Zarqawi met bin Laden while establishing a training camp in Afghanistan in 1999, but initially declined recruitment into Al-Qaeda. His later Iraqi network became Al-Qaeda in Iraq. Affiliates in Baghdad coordinated personnel, money and supplies for operations across Iraq. Zarqawi’s network attacked Shiites, security forces and international personnel in a deliberate effort to provoke sectarian conflict and civil war. Its violence against Shiites also drew criticism within Al-Qaeda. The Islamic State of Iraq was declared in October 2006, years before the Islamic State’s 2014 caliphate declaration. A 2010 raid killed leading figures in the Iraqi organization, yet local recruitment and grievances helped sustain it.

Al-Qaeda in the Arabian Peninsula illustrates the network’s regional development. An earlier Saudi affiliate used the same name while attacking Saudi authorities and Westerners in the kingdom; a later organization became prominent in Yemen. Other branches and aligned groups operated in North and East Africa and South Asia. Their leaders could pursue distinct local policies, including disputes over whom to attack. In Yemen, AQAP leaders disagreed about a strategy of avoiding attacks on the Houthi terrorist organization, which the branch had fought in earlier years. Al-Qaeda’s African branches also attempted a media campaign in 2014 to mobilize fighters for the Central African Republic, but the effort failed to produce the mobilization sought.

Funding and sponsors

Al-Qaeda’s early network relied partly on private donors from Saudi Arabia and the Gulf. Its camps, travel arrangements and operational infrastructure required sustained resources. For major attacks, leaders arranged material support over long periods, including transport, explosives, safehouses and false identities. The organization generally avoided routine wire transfers for individual attacks and did not necessarily distribute attack funds directly from central leadership. As branches became more autonomous after 2001, their financial arrangements varied with their local circumstances. The Golden Chain donor record documents names associated with the early network; appearance on that list alone does not establish participation in a particular attack.

Claims of state sponsorship require separate evidence. Iraq under Saddam Hussein supported and cooperated with armed organizations, including documented financial support for families of suicide bombers in Gaza and Judea and Samaria. A review of captured Iraqi documents found no direct connection between Saddam’s regime and Al-Qaeda. Those findings do not erase Iraq’s other relationships with armed groups, and those relationships do not establish an Al-Qaeda operational link. A Libyan National Army accusation that a Qatari intelligence general financed Al-Qaeda, Islamic State and the Muslim Brotherhood through a bank transfer does not establish that the transfer occurred.

Attacks and operations

The East African embassy bombings, USS Cole attack and September 11 remain Al-Qaeda’s best-known operations. They reflected a strategy of striking American personnel and interests abroad and, on September 11, civilians in the United States itself. The organization also sought opportunities against Israel and regional governments. In 2012, Jordanian intelligence disrupted an Al-Qaeda-linked plot targeting the American embassy in Amman, Jordanian government sites, shopping centers and cafés. Identified targets included two large malls and locations in Abdoun, a district containing foreign embassies. A planned suicide bombing at the central bus station in Beersheba was never carried out.

Al-Qaeda’s Iraqi branch conducted an especially violent campaign during the Iraq War. Zarqawi targeted Shiite communities to intensify sectarian strife alongside attacks on security forces and international personnel. The network’s development also produced a lasting rival. Its leadership pursued an independent policy in Syria and rejected al-Zawahiri’s authority. When Abu Bakr al-Baghdadi announced a merger with Jabhat al-Nusra, Nusra’s leader, Abu Mohammed al-Jawlani, rejected it. Al-Zawahiri annulled the proposed union in June 2013 and recognized Jabhat al-Nusra as Al-Qaeda’s separate Syrian branch. The Iraqi leadership defied that ruling, dividing the jihadist movement into hostile Islamic State and Al-Qaeda camps with separate military, logistical and propaganda systems.

During the Syrian civil war, Jabhat al-Nusra sought influence among rebel factions, a role in overthrowing Bashar al-Assad and substantial influence in any successor government. In November 2013, Nusra operatives and Free Syrian Army fighters captured the Al-Omar oil field near Deir ez-Zor. That month Nusra and Islamic State forces also fought over a gas plant in the area. In February 2014, Nusra attacked a prison in Aleppo using a truck bomb driven by British jihadist Abdul Waheed Majid. Al-Zawahiri opposed Baghdadi’s territorial caliphate model and later directed his Syrian followers toward sustained guerrilla warfare and support from abroad. In an October 2013 message, he urged rival jihadist forces to unite against Assad and cease cooperation with secular forces.

Nusra’s relationship with Al-Qaeda then fractured. In 2016, its announced break with Al-Qaeda divided supporters and drew objections from senior figures loyal to al-Zawahiri. Al-Jawlani, later known as Ahmed al-Sharaa, formed Hayat Tahrir al-Sham in 2017. HTS leaders arrested prominent Al-Qaeda loyalists who challenged their Syrian focus. In November 2017, al-Zawahiri accused HTS leadership of breaking allegiance and persecuting those loyalists. Six jihadist groups withdrew from HTS in February 2018 to establish Guardians of Religion, marking a further rupture. HTS’s later local administration and conflict with Islamic State cells changed its alliances; its origins in Al-Qaeda’s Syrian branch remain part of its history.

Designations and international status

Al-Qaeda is a terrorist organization and the subject of international counterterrorism measures. Following September 11, United Nations Security Council Resolution 1373 required states to act against terrorist financing, and governments across the Middle East froze Al-Qaeda assets. The United States and its allies also pursued the organization through military operations, intelligence work and sanctions. A 2016 summit of United States and Gulf Cooperation Council leaders committed to intensifying efforts against Al-Qaeda and Islamic State while addressing destabilizing activity by the Iranian regime.

Regional and international action has constrained Al-Qaeda without producing uniform outcomes across its branches. Intelligence improvements and disrupted plots reduced its ability to repeat September 11 in the United States. United States intelligence nevertheless assessed in 2008 that Al-Qaeda sought chemical, biological, radiological or nuclear material for attacks. National and international assessments have had to distinguish central leadership from affiliates and local groups claiming its name. The hostile split with Islamic State further complicated the landscape: Islamic State emerged from the Iraqi organization’s history but did not remain subordinate to Al-Qaeda as it expanded into Syria.

Current status

Al-Qaeda remained active after the deaths of bin Laden and al-Zawahiri, though its central leadership lost key figures and its branches did not operate as a single disciplined command. Regional organizations continued armed campaigns, while supporters circulated propaganda across websites, forums, messaging services and mainstream platforms. Al-Qaeda’s As-Sahab media arm distributed recordings by bin Laden and al-Zawahiri. On the seventeenth anniversary of September 11, it released a half-hour al-Zawahiri recording calling for jihad against the United States and its allies. Online supporters of Al-Qaeda and Islamic State have also used September 11 anniversaries to praise the attackers and mock victims.

Digital activity has helped Al-Qaeda sustain recognition beyond territory it controls. Its online ecosystem has repeatedly rebuilt after platform removals, using new services alongside older sites. In 2026, pro-Al-Qaeda accounts circulated a video commemorating the September 11 attacks and material praising bin Laden and al-Zawahiri. Supporters also competed online with Islamic State supporters for attention and recruits. That activity does not by itself establish central command over every account or local cell, but it preserves the organization’s messaging and international reach.

Al-Qaeda has continued to seek openings in later conflicts. After the October 7 attacks, it moved closer to Hamas, a terrorist organization, and issued fresh guidance to members and supporters. Veteran figure Saif al-Adel proposed ways to exploit the ensuing war internationally and called for a boycott of Western products to pressure Israel and Arab governments. These interventions sit alongside the network’s regional activity and internal divisions. Al-Qaeda’s history since 2001 shows both the damage inflicted by counterterrorism campaigns and its ability to survive through autonomous branches, alliances and propaganda after the loss of founding leaders.