Vietnam Before America: France, the Vietcong and the Cold War

From Colony to Cold War Battleground

Vietnam in 1945 was a French colony that had been occupied by Japan during the Second World War. When Japan surrendered, the Vietnamese nationalist leader Ho Chi Minh declared an independent Democratic Republic of Vietnam in Hanoi on 2 September 1945, the same day Japan formally surrendered to the Allies. France refused to accept independence and returned to reassert colonial rule. By 1946 a war had begun between French forces and Ho’s communist-led Vietminh. What started as a colonial conflict turned, after Mao’s 1949 victory in China, into a Cold War problem that drew in both Moscow and Washington.

Key Fact

Ho Chi Minh declared Vietnamese independence on 2 September 1945. The First Indochina War between France and the Vietminh ran from 1946 to 1954 and ended with the French defeat at Dien Bien Phu. The Geneva Conference in July 1954 divided Vietnam at the 17th parallel pending elections that were never held.

Why the USA Took Sides

In 1945 Ho had hoped for American support. He had quoted from the US Declaration of Independence in his Hanoi speech, and US wartime advisers had worked with the Vietminh against the Japanese. Truman did not respond. By 1949, with Mao’s victory in China, the US position changed sharply. Vietnam now mattered as a domino: if it fell, Laos, Cambodia, Thailand, Burma and beyond might follow. The domino theory was made explicit by President Eisenhower in April 1954, but the underlying logic shaped policy from 1950 onward.

From 1950 the USA began funding the French war effort. By 1954 American aid was paying for roughly 80 per cent of French military costs in Indochina. American officials considered direct intervention but stopped short. The China lesson loomed: a US ground war on the Asian mainland against communist forces was politically and militarily unattractive. Instead the USA picked allies, supplied weapons and waited to see whether the French could win without American troops.

Eisenhower set out the domino theory at a press conference on 7 April 1954, a month before Dien Bien Phu fell. He compared Indochina to a row of dominoes; knock the first one over, and the rest would topple. The image was vivid and shaped public debate, but it left a lot unsaid. Were the dominoes inevitable, or only likely? Were they all the same size, or were some, like India, far harder to push over? Some scholars later argued that the theory exaggerated the unity of communist movements, treating local nationalist struggles as instruments of Moscow and Beijing. In 1954, however, the metaphor served a clear political purpose: it made the case for staying in Vietnam without committing US troops.

Dien Bien Phu

By late 1953 the French had decided to draw the Vietminh into a set-piece battle. They chose Dien Bien Phu, a remote valley in the north-west, near the Laotian border. The plan assumed that Vietminh artillery could not be dragged through the surrounding mountains; the French garrison of around 13,000 troops would be supplied by air and would crush an attacker who tried to dig in. The Vietminh general Vo Nguyen Giap proved the assumption wrong. Tens of thousands of Vietnamese porters disassembled artillery pieces and carried them on bicycles and by hand into the hills overlooking the French base. Chinese supplies, including modern artillery, came across the border.

The siege began on 13 March 1954 and lasted fifty-five days. Vietminh artillery dominated the runway, making air resupply almost impossible. The French government asked Washington for airstrikes, even hinting at the use of atomic weapons. The new Eisenhower administration declined: Britain refused to support intervention, and the US Congress would not authorise unilateral war. On 7 May 1954 the French garrison surrendered. The defeat ended French Indochina politically; negotiations had already opened in Geneva.

Geneva and the Division at the 17th Parallel

The Geneva Conference, held between April and July 1954, brought together France, the Vietminh, the State of Vietnam (the French-backed government in Saigon), the USSR, China, the USA and Britain. The agreement reached on 21 July divided Vietnam temporarily at the 17th parallel: a communist Democratic Republic of Vietnam under Ho in the north, a non-communist State of Vietnam in the south, and elections to reunify the country in 1956. Laos and Cambodia became independent neutral states.

The agreement collapsed quickly. The USA refused to sign the final declaration, fearing Ho would win the elections; Saigon, under the new Prime Minister Ngo Dinh Diem, also refused. The 1956 elections never happened. Diem launched a campaign of repression against suspected Vietminh in the South. From 1959 communist guerrillas in the South began an organised insurgency, and in December 1960 they formed the National Liberation Front — the Vietcong. American military advisers were already in Saigon. The Second Indochina War — what English-speaking countries would later call simply the Vietnam War — had begun.

The 1954 Geneva agreement is sometimes treated as a clean settlement that the Americans then broke. The picture is more complicated. The settlement was a temporary division pending elections, but neither superpower trusted the other to allow free elections in ‘their’ half of Vietnam. The USA refused to sign the final declaration partly because intelligence assessments suggested Ho would win nationwide elections by a comfortable margin. Diem’s government refused for similar reasons. From the Vietminh side, the agreement was accepted partly because Soviet and Chinese diplomats pressed Ho to compromise; both Moscow and Beijing wanted to avoid an Indochina war that might draw in the USA. The result was a frozen front line that almost no party at Geneva expected to hold for long.