08/30/2026
Twenty Years of War: 2001–2021
On August 30, 2021, the last U.S. military forces departed Afghanistan, bringing America’s longest war to an end and closing a major chapter in two decades of warfare that followed the terrorist attacks of September 11, 2001.
The Global War on Terror began in the aftermath of 9/11. On October 7, 2001, the United States launched Operation Enduring Freedom, beginning military operations in Afghanistan against al-Qaeda and the Taliban.
Over the next two decades, the conflict reached far beyond Afghanistan. American forces served in Iraq, Syria, the Philippines, the Horn of Africa, and throughout the Middle East, Africa, and Central and South Asia. Their missions ranged from large-scale ground combat to air and naval operations, counterterrorism, intelligence gathering, training, and support for allied forces.
The scale of American military service during the post-9/11 wars was immense:
• Millions of American service members deployed in support of post-9/11 military operations, with many serving multiple deployments.
• More than 7,000 U.S. service members died during the major post-9/11 war operations.
• More than 50,000 were wounded in action.
In Afghanistan alone, 2,461 American service members lost their lives, while more than 20,000 were wounded.
For twenty years, these conflicts shaped the lives of an entire generation of American service members and their families.
On this anniversary of the end of the war in Afghanistan, we remember those who served across the globe, those who returned home carrying the wounds of war, and those who never came home.
Preserve • Honor • Educate
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Learn More:
https://dcas.dmdc.osd.mil/dcas/conflictCasualties/oco
https://history.army.mil/Publications/Publications-Catalog/Operation-Enduring-Freedom-Collection/
https://www.history.navy.mil/browse-by-topic/wars-conflicts-and-operations/middle-east/operation-enduring-freedom.html
https://www.afhistory.af.mil/FAQs/Fact-Sheets/Article/458975/2001-operation-enduring-freedom/