When the Bombs Stopped: The Legacy of War in Rural Cambodia - Hardcoverby Erin Lin (Author) How undetonated bombs from a war that ended more than fifty years ago still affect Cambodian farmers and their land Over the course of the Vietnam War, the United States dropped 500,000 tons of bombs over Cambodia more than the combined weight of every man, woman, and child in the country. What began as a secret CIA infiltration of Laos eventually expanded into Cambodia and escalated into a nine year war over the Ho Chi Minh trail