Until Afghanistan, Vietnam was America's longest war. The images we're seeing now have a lot of parallels with that war — right down to the scenes of the chaotic, desperate final days.

Left: Members of the 1st Division Infantry look for Viet Cong fighters during the Vietnam War. Right: U.S. soldiers gather as their wounded comrades are airlifted by a Medevac helicopter in Afghanistan in 2011. Photos: (left) Corbis Historical via Getty Images; (right) Johannes Eisele/AFP via Getty Images

Left: Wounded U.S. soldiers are evacuated by helicopter after a Vietnam War battle in 1967. Right: U.S. Army soldiers protect an injured comrade from dust and smoke flares after an improvised explosive device (IED) blast in 2012. Photos: (left) Francois Mazure/AFP via Getty Images; (right) Munir Uz Zaman/AFP via Getty Images

Left: Soldiers salute as remains of American GIs are carried to a plane in Hanoi. Right: A U.S. Army team carries the remains of a U.S. Army Sgt. 1st Class who was killed in Afghanistan in 2019. Photos: (left) Steve Raymer/Corbis via Getty Images; (right) Mark Wilson/Getty Images

Left: A young Vietnamese boy arrested during an anti-government demonstration in Danang, South Vietnam, stares out from behind barbed wire. Right: Displaced Afghans look through a fence in August 2021. Photos: (left) Nik Wheeler/Corbis via Getty Images; (right) Paula Bronstein/Getty Images

Left: Desperate South Vietnamese citizens try to scale the walls of the American Embassy in 1975. Right: Afghans rush to the Hamid Karzai International Airport as they try to flee Kabul. Photos: (left) Nik Wheeler/Corbis via Getty Images; (right) Haroon Sabawoon/Anadolu Agency via Getty Images

Left: Long lines of people hurry to get exit visas and air tickets out of Vietnam. Right: Afghans crowd at the tarmac of the Kabul airport. Photos: (left) Bettmann via Getty Images; (right) AFP via Getty Images

Left: An American Marine points an M-16 rifle at a South Vietnamese person trying to climb over the wall at the American Embassy to join evacuation flights. Right: A U.S. soldier points his gun toward an Afghan passenger at the Kabul airport. Photos: (left) Bettmann via Getty Images; (right) Wakil Kohsar/AFP via Getty Images

Left: A CIA employee helps Vietnamese evacuees onto an Air America helicopter. Right: The U.S. national flag is reflected on the windows of the U.S. embassy building in Kabul. Photos: (left) Bettmann via Getty Images; (right) Sajjad Hussain/AFP via Getty Images