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Home » Everything You Think You Know About Vietnam Is Wrong — Historian Mark Moyar (Transcript)

Everything You Think You Know About Vietnam Is Wrong — Historian Mark Moyar (Transcript)

Read the full transcript of historian Mark Moyar’s interview on TRIGGERnometry Podcast, May 9, 2026.  

Editor’s Notes: In this episode of Triggernometry, historian Mark Moyar joins the show to challenge the conventional narratives and deeply ingrained myths surrounding the Vietnam War. Moyar argues that the conflict was far from an inevitable failure, highlighting how political indecision and strategic blunders by leaders like Lyndon B. Johnson and Robert McNamara ultimately tied the hands of the military. The conversation explores the war’s profound impact on the American psyche—from the erosion of public trust to the creation of lasting cultural divides—and offers a provocative look at how the conflict could have ended differently.  

The Roots of the Vietnam War: Communism and the Domino Theory

KONSTANTIN KISIN: Mark, welcome to Triggernometry.

MARK MOYAR: Great to be with you.

KONSTANTIN KISIN: Great to have you on. We’re going to talk about the Vietnam War. And as we discussed before we started, both the two of us and quite a lot of people watching this might not know very much about that war, but we feel like some of the conversations that have been happening in American society lately sort of seem to, there seems to be some connection with the things that happened, the conclusions that were made at that time, the impact on the collective psyche of this country. So tell us what happened. What was the Vietnam War? How did it happen? When did it happen? Why did it happen?

MARK MOYAR: Well, that’s a great question. And I think if you want to understand the roots of this war, you have to go back at least to 1949. And that’s when the Chinese Communists won the Chinese Civil War, which is an aspect of our history that most people really don’t know very well. But it’s one of the most important events of the 20th century.

And up until that time, you had the Truman administration, a lot of other people claiming that communism isn’t really a big deal in Asia. We shouldn’t be too worried about it. And for a while, a lot of people thought Mao was just this nice sort of nationalist who said he was going to be democratic. But finally, when he takes over, suddenly reality sets in that these communists are actually pretty bad folks who are going to kill lots of people and try to take over the world.

And so you see then in 1950, the US starts aiding the French in Indochina, Vietnam. And then the US also goes into Korea to fight the Korean War. A lot of people second-guess and kind of forget about these underlying sources. But I think you’ve got to fundamentally understand that this is a war against communism and this is an ideology that killed 100 million people in the 20th century, which, again, is relevant today because you now have young people who don’t really know the history saying, oh, socialism, communism aren’t really not that big a deal.

But Vietnam clearly is aimed at preventing the spread of communism, and particularly Chinese-led communism in Southeast Asia. And so when the French War ends in 1954 and the French just decide they’re sick of this, the United States decides it’s going to help a new government in South Vietnam as part of the effort to contain communism, because what almost all the Americans at this time thought was that this so-called Domino Theory meant that if you lose a place like South Vietnam, the other countries in the region are going to fall. And that will be the guiding principle for most of the war.

America’s Support for France and the Fall of Dien Bien Phu

FRANCIS FOSTER: And so we’ve got the Domino Theory, but what people probably don’t know as well, Mark, is that America was financing and helping to support the French financially. I mean, they were paying billions of dollars even back then, which was a lot of money. It’s a lot of money now, but back then it was even more money.

MARK MOYAR: Yes. And initially the United States was not very keen on this French effort because Roosevelt and then Truman kind of thought European colonialism is kind of passé and we’re not going to support it. But then when they saw this communist threat, they agreed to help the French. And the French also made promises to the Vietnamese that they could have a greater degree of independence.

It’s also interesting when you get to 1954 and the French are surrounded at Dien Bien Phu, they come to the Americans and say, “Can you bomb the communists who have surrounded us?” And Eisenhower actually goes to the British and says, “We’d like you to join us in an anti-communist coalition.” And the British say, “Well, you didn’t help us out in India, so we’re not really that keen on helping save the French in Indochina.” And so for that reason, the United States holds its hand.

Now, it creates an interesting what-if. I do think had we bombed, actually, we could have perhaps saved the French, but we didn’t really know that at the time. We didn’t realize the Viet Minh, the communists as they called themselves, had committed almost their entire army to Dien Bien Phu and were very vulnerable. But again, we didn’t know that at the time. So the US then decides we’re just going to hold onto the southern half. French leave, and so we support this new government in South Vietnam.

From Division to Conflict: The Path to American Involvement

KONSTANTIN KISIN: Well, the French surrender once again. What a shocker. So how do we get from this situation that the communists have the North, the American-backed anti-communists have the South, how do you get from that to American boots on the ground?

MARK MOYAR: Yeah, so at the beginning, the new president of South Vietnam is Ngo Dinh Diem. A very religious Catholic Vietnamese. And a lot of people don’t think he’s going to succeed because there’s a lot of chaos in the South, but he is able to consolidate power.