An alliance made in the 14th century was invoked in the Second World War. In 1943 Portugal, citing its treaties with England of 1373 and 1386, let the British use bases in the Azores.

1373 · 1386 · 1943 · apart: 570 years

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The event

• Treaty of Windsor1386 · Windsor. The 1386 treaty sealed the Anglo-Portuguese alliance of 1373 with the marriage of King John I to an English princess. The alliance has never been broken and is considered the oldest still in force anywhere.

14th century · 20th century

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