And Turtle , ... Can you provide verification of the statement millions of Vietnamese lives were lost because we pulled out?
Uhm, yeah. When we pulled out Pol Pot and his communist Khmer Rouge took over Cambodia and instituted a twisted version of agrarian civilization where city dwellers were forced to relocate to work in farm camps and other forced labor projects with the goal of restarting civilization in the Year Zero.
The "Killing Fields" (they made a movie about it, nominated for 7 Oscars, won 3 of them) is where people were forced to work in farm camps on a diet of one tin of rice (180 grams) per person every two days.
Those who refused to relocate were summarily executed. Many were executed anyway under Pol Pot's ethnic cleansing campaign. Between 1975-1978 the combined executions, slave labor, malnutrition and poor and deliberately withheld health care yielded death on a mind-numbing scale.
While there have been others, and with higher numbers, the genocide of Pol Pot is probably the second most publicized incidence of genocide of the 20th century (the Holocaust being #1). Estimates vary greatly, between 750,000 and 3.3 million, with the most commonly used authoritative figure being 1.6 million people. Plus another 2 million fled the country, with nearly 1 million of those "boat people" dying at sea. Those that include the deaths of the boat people generally put Pol Pot's genocide at 2.5 million people.
It is undisputed that if we had not pulled out he never would have taken power.
For more information, Google "Pol Pot" and "genocide". For that matter, I'll bet you could Google "20th Century genocide" and take a look at the various lists, and Pol Pot will be right up there near the top of every one of them. If you haven't seen it, "The Killings Fields" is a really good movie, told about half the time from the Cambodian point of view, and doesn't shy away from anything. It's brutal, and one of the most emotional movies you are likely to see.
As a side note to the movie, Dr. Haing S. Ngor won an Oscar for Best Supporting Actor (Sam Waterston lost his Best Actor bid to F Murray Abraham that year for Amadeus). Nigor was not an actor, he was a real doctor, served as a doctor in the Cambodian army, and was captured and tortured by the Khmer Rouge. He escaped execution by convincing them that he was not a doctor and had no education. He fled and came to the US, where he later acted in the film. Born in 1940, in 1996 he was found shot to death in the garage of his Los Angeles apartment building. There is strong evidence that supports the assertion that he was killed because of his opposition to the Khmer Rouge. Add one more to Pol Pot's numbers.