Claim: Ernest Medina participated in a documented mass killing.
Evidence: He was the commanding officer of Company C , 1st Battalion , 20th Infantry of the 11th Brigade , Americal Division , the unit responsible for the My Lai Massacre of 16 March 1968.
The Mỹ Lai Massacre -LRB- thảm sát Mỹ Lai , -LSB- tʰâːm ʂǎːt mǐˀ lāːj -RSB- ; -LSB- ˌmiːˈlaɪ -RSB- , -LSB- ˌmiːˈleɪ -RSB- , or -LSB- ˌmaɪˈlaɪ -RSB- -RRB- was the Vietnam War mass killing of between 347 and 504 unarmed civilians in South Vietnam on March 16 , 1968.