On March 16, 1968, Capt. Ernest Medina led his infantry company in an assault on the village of Son My, along the central coast of South Vietnam, as part of a mission to find and destroy a battalion of the National Liberation Front, also known as the Vietcong. One of the hamlets within the village was called My Lai.
Operating under the assumption that villagers of My Lai would be away at the market, Captain Medina planned an aggressive sweep through the area, ordering his men to destroy everything and to kill anyone who resisted. By the end of the day American forces had killed 347 to 504 unarmed Vietnamese women, children and old men, and raped 20 women and girls, some as young as 10 years old.
The massacre at My Lai was not the only time American troops committed war crimes against Vietnamese civilians, but it was the single worst instance; its severity, its cover-up and the eventual trial of just a handful of the unit’s leaders became a synonym for the entire American war in Vietnam. But while even today the massacre is often portrayed as having been perpetrated by a unit of misfits, the cause was a failure in leadership, from the commander of Captain Medina’s division, Maj. Gen. Samuel W. Koster, to the platoon leader most closely associated with the killings, Second Lt. William Calley.