Overview

(Stand: 9. Apr. 2019) Unter Kontrolle von: Regierung, NATO u. Verbündete Taliban, al-Qaida u. Verbündete Islamischer Staat u. Verbündete

The war in Afghanistan that began in late 2001 is the most recent phase of a multi-decade Afghan conflict. Triggered by the September 11, 2001 terrorist attacks in the United States, a U.S.-led military campaign aimed to remove the Taliban government that had harbored al-Qaida and to disrupt transnational terrorist networks. What began as a relatively swift overthrow of the Taliban transformed, over years, into a prolonged counterinsurgency, international reconstruction effort, and ultimately a contested political struggle between Afghan institutions, foreign forces, and multiple armed movements.

Key phases and turning points

  • 2001–2002: Invasion and collapse of the Taliban regime; establishment of an interim Afghan government and the United Nations-backed security mission.
  • 2003–2008: Expansion of international forces under the International Security Assistance Force (ISAF); persistent insurgent attacks and gradual resurgence of Taliban networks.
  • 2009–2014: Major counterinsurgency operations, a surge in international troops, efforts to build Afghan security forces, and the formal transition from ISAF combat operations to Afghan-led security responsibility.
  • 2015–2020: Continued insurgency, emergence of the Islamic State Khorasan Province (IS-K), and diplomatic efforts including talks and a U.S.-Taliban agreement in 2020 intended to set a timetable for foreign withdrawal.
  • 2021 and after: Withdrawal of most international combat forces, rapid Taliban territorial gains, and renewed debate over Afghanistan’s political future and humanitarian needs.

Combatants, capabilities and tactics

The conflict involved a shifting mix of actors: the United States, NATO and partner militaries; Afghan national security forces established with international assistance; the Taliban movement; militant groups such as al-Qaida and IS-K; and a range of local militias and criminal networks. Coalition and Afghan forces used conventional and special operations, air power and intelligence-driven strikes, while insurgents relied on guerrilla tactics, improvised explosive devices (IEDs), assassinations, and efforts to control rural areas. Over time both sides adapted to asymmetric warfare and to the political dimension of the conflict.

Politics, reconstruction and society

Beyond military operations, international involvement included attempts to rebuild institutions, expand education and health services, reform security forces, and reduce the narcotics trade that finances armed groups. Progress was uneven: urban areas saw some development gains, including increased school enrollment and new infrastructure, while governance challenges—corruption, weak judicial systems, and limited state presence in many provinces—persisted. Civilians bore much of the human cost, suffering displacement, casualties, and disruptions to livelihoods.

Insurgency, terrorism and regional dynamics

The insurgency evolved in response to military pressure and changing political opportunities. The Taliban remained the most potent insurgent force, often linked to local power networks and cross-border sanctuaries. IS-K emerged in the mid-2010s as a rival extremist group, responsible for high-profile attacks. Regional actors, including neighboring states, influenced the conflict through diplomacy, covert support, refugee flows and economic ties, making Afghanistan a focal point of broader regional security competition.

Peace efforts, withdrawal and legacy

Multiple tracks of diplomacy and peace negotiations sought an exit from open warfare, culminating in agreements and intermittent talks among Afghan parties and external stakeholders. The reduction and eventual withdrawal of foreign combat forces raised questions about the durability of political settlements and the future capacity of Afghan institutions. The war’s legacy includes contested state-building efforts, lasting security challenges, significant civilian trauma and displacement, and an enduring international debate about the limits of military intervention in resolving complex internal conflicts.