That the VC and also the regular North-Vietnamese forces took advantage of the huge civilian support (against the then termed US imperialists and it's corrupt Saigon allies) via deploying propaganda units/agents all over South Vietnam and many villages therefore housing voluntarily or unwillingly VC and NVA combat troops is known. That the RVN and US troops pulverized and used chemical warfare onto every square inch in South-Vietnam upon a mere VC/NVA suspicion - regardless of civilian lives/casualties is also known.
As for Mai Lai - there were
no VC troops at the time, and the advancing US force also had
not been taking fire from Mai Lai.
On March 16, 1968, a platoon of American soldiers brutally kills as many as 500 unarmed civilians at My Lai, one of a...
www.history.com
In March 1968, a platoon of soldiers from Charlie Company received word that Viet Cong guerrillas had taken cover in the Quang Ngai village of Son My. The platoon entered one of the village’s four hamlets, My Lai 4, on a search-and-destroy mission on the morning of March 16. Instead of guerrilla fighters, they found unarmed villagers, most of them women, children and old men.
The soldiers had been advised before the attack by army command that all who were found in My Lai could be considered VC or active VC sympathizers, and were told to destroy the village. They acted with extraordinary brutality, raping and torturing villagers before killing them and dragging dozens of people, including young children and babies, into a ditch and executing them with automatic weapons.
The massacre reportedly ended when an Army helicopter pilot, Warrant Officer Hugh Thompson, landed his aircraft between the soldiers and the retreating villagers and threatened to open fire if they continued their attacks.
As I and others have already stated - war is hell, and IMO there is no warring party that could claim being innocent of atrocities or of killing civilians intentionally.