On Monday afternoon, Major General Chris Donahue, commander of the 82nd Airborne, boarded a gray military plane in Kabul, becoming the last American soldier to leave Afghanistan. His departure, photographed in dramatic, slime-green night vision and released by the Pentagon, capped off a dramatic month in Kabul: its bloodless fall to the Taliban and the ignominious collapse of the Afghan government; the desperate scenes at the airport and the extraordinary evacuation of more than 100,000 civilians in a matter of weeks; a terrorist attack that killed 13 American service members and nearly 200 Afghans; the retaliation, in which several Afghan children were killed; and the end of a twenty-year war that killed and maimed tens of thousands of Afghans and Americans and cost trillions of dollars.