Beginnings of the Vietnam War

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The 11th-grade level American History course podcast for BESD.

In the early 1950s, the Cold War was heating up. The Korean War had just ended. The United States and the Soviet Union remained locked in this global staring contest, and neither side wanted to blink.

And now, the same Cold War tension is shifting to Southeast Asia.

Vietnam is about to become another proxy war — the United States and communist forces backing opposite sides, fighting indirectly through someone else’s country.

But the story actually starts with France.

Vietnam had been a French colony until Japan took it over during World War II. And now that the war was over, France wanted its colony back. Vietnam had been under French control for decades, and the French weren’t ready to let it go.

There was just one problem.

Ho Chi Minh.

Ho Chi Minh had helped form the Communist Party in Vietnam. He also led a nationalist independence group called the Vietminh. And here’s what’s important: he wasn’t just fighting for communism. He was fighting for independence. He wanted Vietnam free from foreign control.

But in the middle of the Cold War — in the era of the Truman Doctrine, when the United States had promised to contain communism wherever it appeared — American leaders didn’t focus on the independence part.

They focused on the communism part.

To them, communism was a spreading threat. They believed in the domino theory — that if one country fell to communism, nearby countries would fall next.

So when France went to war against Ho Chi Minh and the Vietminh, the United States stepped in to help France.

And it didn’t work.

In 1954, France lost.

That defeat forced a decision. Vietnam would be divided along the 17th parallel. North Vietnam would be led by Ho Chi Minh and the communists. South Vietnam would be non-communist and supported by the United States.

So why was the country divided?

Because after France’s defeat, global powers split Vietnam in two — trying to contain communism the same way they had in Korea.

Now here’s where things get messy.

The United States backed a leader in South Vietnam named Ngo Dinh Diem.

On paper, he was supposed to build a strong, anti-communist government.

In reality, he ruled like a dictator.

He shut down elections. He imprisoned political opponents. And he targeted Buddhists — even though many people in South Vietnam were Buddhist. Temples were destroyed. Protesters were arrested.

Then came one of the most shocking images of the entire era.

Buddhist monks began protesting through self-immolation — publicly setting themselves on fire. The images spread across the world. People were stunned.

By 1963, even the United States had lost confidence in him.

South Vietnamese generals — with U.S. support — assassinated Diem.

Problem solved?

Not even close.

His death created a power vacuum. No strong leader replaced him. South Vietnam became politically unstable. Governments rose and fell quickly.

And while the South struggled to hold itself together… Ho Chi Minh and the communist North were still there.

Waiting.

So why was Diem’s assassination a problem?

Because instead of stabilizing South Vietnam, it weakened it — making it more vulnerable to the North.

Now let’s talk about how the United States moved from “supporting” to fully fighting.

By this point, members of Congress were increasingly worried that South Vietnam might collapse — and that communism would spread further in Southeast Asia. The fear of another domino falling was very real in Washington.

And so, in 1964, Congress passed the Tonkin Gulf Resolution.

This gave President Lyndon Johnson broad power to use military force in Vietnam.

Technically, Congress never officially declared war. That created some legal debate at the time — especially about the draft. Korea had been handled in a similar way.

But let’s be honest.

To historians, to international law, and to the American public — this was a war, because the resolution allowed Johnson to send troops and dramatically expand military action.

So how did the U.S. get involved in a war in Vietnam?

First, by helping France.
Then, by backing South Vietnam.
Finally, by passing the Tonkin Gulf Resolution, which opened the door to full military escalation.

And here’s something that might surprise you.

At the beginning, most Americans supported it.

Why?

Because in the Cold War mindset, stopping communism felt necessary. Even patriotic. Many Americans believed they were preventing another domino from falling.

So early on, the war had widespread support.

But that support would not last.

And that’s the situation by the mid-1960s — a divided Vietnam, a weakened South, and a United States now fully committed to stopping communism there.

And that’s how Vietnam begins — not as an isolated conflict, but as another chapter in the Cold War story you’ve already seen before.