Core al-Qaeda's global operations essentially ceased after 2009, with the group ending primarily through strategic failure rather than military decapitation alone. The organization suffered self-inflicted damage from killing Muslim civilians, losing popular support, and internal splits with ISIS, which attracted younger recruits with territorial control.
Al-Qaeda Has Ended, U.S. Officials Should Say So
Over 15,000 U.S. military members and contractors died in post-9/11 wars; approximately 1.8 million became disabled; hundreds of allied service members from Canada, Denmark, France, Germany, Italy, and the UK died in combat.