The My Lai Massacre (pronounced IPA: [mi.˧˩˥'lɐːj˧˧], Thảm sát Mỹ Lai, Thảm sát Sơn Mỹ) was the killing of hundreds of civilians by United States troops at the village of My Lai, Vietnam on March 16, 1968. A memorial in My Lai lists the names of 504 victims.