Commentary: Trump was right to bring troops home from Afghanistan. Biden should finish the job

When President Donald Trump took office in 2017, the war in Afghanistan was 16 years old. The original mission, meant to punish the perpetrators of the 9/11 attacks and their Taliban enablers, was long since completed, but the Taliban held or contested 45% of Afghan territory. There were about 8,400 U.S. forces on the ground, far below the peak of 100,000 in 2010 (excluding contractors, who often equal or exceed the military presence proper). That deployment had been led by 17 commanders — turnover is high in the “graveyard of empires.”