One vote in Parliament set Britain's course for nearly half a century.

On October 28, 1971, after days of debate, the House of Commons voted 356 to 244 in favor of the principle of joining the European Economic Community. Prime Minister Edward Heath's government had negotiated the terms.

The United Kingdom formally joined on January 1, 1973, alongside Ireland and Denmark. Britain's place in Europe would remain one of its most debated questions for decades to come.

Which turning point in European history do you find most fascinating?

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