National security. For insiders. By insiders. The U.S. military suffered more than 20,000 casualties in Afghanistan. Then America went home, leaving behind a tattered country with an uncertain future. The victims of this war were left with scars both physical and emotional, from American servicemembers who dedicated years to the conflict only to see the county fall in a few days, to Afghan soldiers who fought alongside American forces and were left behind on a crowded tarmac in Kabul.