Analysis of information sources in references of the Wikipedia article "Operation Freedom Deal" in English language version.
First, the bombing forced the Vietnamese Communists deeper and deeper into Cambodia, bringing them into greater contact with Khmer Rouge insurgents.
The evidence of survivors from many parts of [Cambodia] suggests that at least tens of thousands, probably in the range of 50,000 to 150,000 deaths, resulted from the US bombing campaigns
An estimated 275,000 excess deaths. We have modeled the highest mortality that we can justify for the early 1970s.
On the higher end of estimates, journalist Elizabeth Becker writes that 'officially, more than half a million Cambodians died on the Lon Nol side of the war; another 600,000 were said to have died in the Khmer Rouge zones.' However, it is not clear how these numbers were calculated or whether they disaggregate civilian and soldier deaths. Others' attempts to verify the numbers suggest a lower number. Demographer Patrick Heuveline has produced evidence suggesting a range of 150,000 to 300,000 violent deaths from 1970 to 1975. In an article reviewing different sources about civilian deaths during the civil war, Bruce Sharp argues that the total number is likely to be around 250,000 violent deaths.
