But the Taliban was defeated by Obama..
Via Washington Post:
The U.S.-led military in Afghanistan suffered one of its worst days in 2015 on Monday, as six U.S. service members were killed and three others were wounded when a motorcycle laden with explosives detonated near them in Parwan province in an apparent suicide attack.
A U.S. military official in Afghanistan confirmed that the troops killed were all Americans. The incident occurred north of Kabul about 1:30 p.m. in a province best known for Bagram air base, a sprawling military complex from which U.S. forces fly F-16 fighter jets and other aircraft.
While the U.S. military no longer carries out offensive operations in Afghanistan following the end of its formal combat mission, it patrols around the base daily to protect it against the Taliban and other enemy groups.