Official Army photographer Ron Haeberle traveled with Charlie Company into My Lai on March 16, 1968. The Company was told that dozens of Viet Cong troops were passing through the area, retreating from battle after the Tet Offensive. Captain Ernest Medina had told his men that all Vietnamese remaining in My Lai after their arrival would be Viet Cong members or sympathizers.
Following the massacre, during which between 347 and 504 civilians were killed, the story remained largely out of the public eye until the media published Haeberle's photographs in November 1969. These photographs would became key evidence in the Army's five-month investigation led by General William R. Peers.
The following gallery showcases a selection of Ron Haeberle's images from the My Lai Massacre as they were used in the Peers investigation.
Many of the images are violent and graphic in nature.
Harry Truman was responsible for finding America's place at the start of the Cold War. Part of the award-winning Presidents collection.
The U.S. government's response to the Holocaust was slow and fueled by complex social and political factors.
During World War II, more than a thousand women signed up to fly with the U.S. military as WASPS.
Lyndon Johnson pushed progressive programs before the Vietnam War eroded his support. Part of the award-winning Presidents collection.
The first officially formed regiment of northern black soldiers who fought in the Civil War.
After the Soviet blockade of West Berlin, British and American pilots delivered tons of food and fuel to the German city by airplane for nearly a year.
A minute-by-minute account, on both sides of the Pacific, leading up to the surprise attack on the U.S. fleet at Pearl Harbor.
Two days in 1967 revealed a nation divided over a war that continues to haunt us.