Historian
Guenter Lewy estimated that around 220,000 civilians were killed during combat operations in South Vietnam, with more dying as a result of their wounds. For official U.S. military operations reports on
free-fire zones, there are no distinctions between enemy KIA and civilian KIA since it was assumed by U.S. forces that all individuals killed in an area declared a free-fire zone, regardless of whether they were combatants or civilians, were considered enemy KIA. Since body counts were a direct measure of operational success, this often caused U.S. battle reports to list civilians killed as enemy KIA. Author
Alex J. Bellamy wrote that the inclusion of civilians killed led to discrepancies between weapons seized and official body counts, noting that the official "enemy KIA" body count during
Operation Speedy Express, was over 10,000 enemy KIA with only 748 weapons recovered. A U.S. Army Inspector General estimated that there were 5,000 to 7,000 civilian casualties from the operation. which were reported as "Viet Cong", as well as any civilians wearing black pajamas and civilians running away from helicopters, including women and children who were again reported as "enemy combatants" KIA. One notable example of this was the purported killing of hundreds of unarmed civilians by
Tiger Force following grievous losses from a PAVN ambush, in which the unit proceeded to kill countless women, children and crippled individuals during
Operation Wheeler/Wallowa. Journalist
Jonathan Schell, who reported on
Operation Cedar Falls, reported a general inability of U.S. forces to discern VC from unarmed civilians, based on tacit ignorance of the culture and the killing of civilians on whim or suspicion. During the operation he was told about numerous incidents including when a man riding a bicycle past a patrol near his town was shot and subsequently declared a VC, and the shooting of a woman carrying medical supplies, who was then declared an enemy combatant serving as a medic post-mortem. British photojournalist Tony Swindell who had documented the conflict claimed that the murder of unarmed civilians who ran and claiming they were enemy combatants was common in the
11th Infantry Brigade,
Americal Division prior to the unit becoming infamous for the My Lai massacre. ==Body count inflation==