1973. US participation in the Vietnam War ends. As troops withdraw, President Nixon pledges to assist the South in the event of invasion by the North.

1975. North Vietnam begins a full-scale assault on the South. Congress does nothing. Hundreds of thousands of South Vietnamese face execution or life in concentration camps. An iconic photograph is taken of the Fall of Saigon, depicting desperate Vietnamese people scrambling to board a helicopter evacuating the last of the American soldiers. It is an image of US failure and shame. Or is it?

In Honourable Exit, Clarke revisits the last days of the Vietnam War to uncover the previously untold story of a life-saving mass evacuation. During those final days, a number of Americans - diplomats, businessmen, soldiers, missionaries, contractors, and spies - risked their lives and disobeyed orders to help their translators, drivers, colleagues, neighbours, friends, and even perfect strangers to escape. By the time the last US helicopter left Vietnam on 30 April 1975, these heroic Americans had helped to spirit over 130,000 South Vietnamese to resettlement in the US and life as American citizens.

Groundbreaking, page-turning, and authoritative, Honourable Exit is a deeply moving history of Americans in one of their little-known finest hours.